Recent Articles

Energy dependence of the volume integrals of the ${}^{3}{He}$ optical potential

Mervat H. Simbel

Phys. Rev. C 10, 1083 (1974) - Published 1 September, 1974

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Elastic and inelastic scattering of 1.5-MeV neutrons by the even- $A$ isotopes of zirconium and molybdenum

F. D. McDaniel, J. D. Brandenberger, G. P. Glasgow, and H. G. Leighton

Phys. Rev. C 10, 1087 (1974) - Published 1 September, 1974

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Differential elastic and inelastic cross sections were measured for 1.5-MeV neutrons scattered by the even- $A$ isotopes of zirconium and molybdenum. The scattering samples were enriched isotopes of ${}^{90}{Zr}$ , ${}^{92}{Zr}$ , ${}^{94}{Zr}$ , ${}^{92}{Mo}$ , ${}^{94}{Mo}$ , ${}^{96}{Mo}$ , and ${}^{100}{Mo}$ . The cross sections were measured using a dynamically biased neutron time-of-flight spectrometer. The differential cross sections have root-mean-square relative and normalization uncertainties of 2 to 3.5% and 7 to 7.5%, respectively, for elastic scattering, and 6 to 13% and 9 to 15%, respectively, for inelastic scattering. Isotopes with similar level structures have almost identical elastic angular distributions. The entire set of data was theoretically fitted using the optical-statistical model with resonance-width-fluctuation corrections. The calculated elastic differential cross section was assumed to be an incoherent sum of shape-elastic and compound-elastic scattering. At the minima in the angular distributions the cross sections were dominated by compound-elastic scattering.

NUCLEAR REACTIONS ${}^{90, 92, 94}{Zr}$ , ${}^{92, 94, 96, 100}{Mo} (n, n)$ , ( $n, n^{'}$ ), $E_{n} = 1.5$ MeV; measured $σ (θ)$ ; deduced optical model parameters. Isotopically enriched samples, neutron time of flight, dynamic bias, compound-elastic scattering, level width fluctuations.

${}^{238}U$ giant resonances and the ${}^{238}U (p, p^{'})$ reaction at $E_{p} = 66$ MeV

M. B. Lewis and D. J. Horen

Phys. Rev. C 10, 1099 (1974) - Published 1 September, 1974

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Measurements of inelastic proton spectra in the region 0-25-MeV excitation energy have been made for the ${}^{238}U (p, p^{'})$ reaction using 66-MeV protons. Two new strongly collective excitation regions of ${}^{238}U$ were discovered at $E_{x} \approx 1.6 - 2.0$ MeV and $E_{x} \approx 10 - 13$ MeV. The ≅1.8-MeV excitation region is complex, and its angular distribution is consistent with $L = 3$ and $L = 2$ groups. The collective resonance region at 10-13 MeV appears to have an $L = 2$ angular distribution with strength to exhaust most of the energy-weighted sum rule, although $L = 3 and 4$ components cannot be rigorously excluded. The remaining excitation region accounts for most of the cross-section strength in the reaction and consists of a relatively smooth continuum background. The results are discussed in terms of the Nilsson model.

NUCLEAR REACTION ${}^{238}U (p, p^{'})$ , $E_{p} = 66$ MeV, $E_{x} = 0 - 25$ MeV; measured $σ (E_{x}, θ)$ ; discuss giant resonances and other collective states.

Two-proton transfer reactions induced by 56-MeV ${}^{16}O$ heavy-ion beam on ${}^{64}{Ni}$ and ${}^{76}{Ge}$ target isotopes

M. -C. Lemaire, M. C. Mermaz, H. Sztark, and A. Cunsolo

Phys. Rev. C 10, 1103 (1974) - Published 1 September, 1974

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An optical model and distorted-wave Born-approximation analysis of elastic scattering one- and two-nucleon transfer angular distributions was employed phenomenologically to determine an optical model potential which reproduced simultaneously the elastic scattering and nucleon transfer data. This potential was found to have an imaginary part of smaller radius than the real one. The relatively weak absorption in the tail region of the optical potential was necessary for the oscillatory behavior at forward angles observed on the direct two-proton transfer angular distributions. The periodicity of these oscillations was $\frac{180 °}{l_{c}}$ , $l_{c}$ being the grazing partial wave corresponding to the half-absorption radius of the strong absorption model. For the ${}^{76}{Ge}$ ( ${}^{16}O$ , ${}^{14}C$ ) ${}^{78}{Se}$ reaction, the anomalous behavior of the angular distribution of the first $2^{+}$ excited level of ${}^{78}{Se}$ favored a two-step mechanism involving core excitation of the target and/or residual nucleus.

NUCLEAR REACTIONS ${}^{64}{Ni}$ ( ${}^{16}O$ , ${}^{16}O$ ), ( ${}^{16}O$ , ${}^{15}N$ ), ( ${}^{16}O$ , ${}^{14}C$ ), ${}^{76}{Ge}$ ( ${}^{16}O$ , ${}^{14}C$ ); $E_{{}^{16}O} = 56$ MeV; measured $σ (θ)$ ; deduced optical model parameters from elastic scattering and DWBA analysis; resolution 250 keV; $θ = 13 - 65 °$ ; $Δ θ = 1.5 °$ .

Levels of ${}^{64}{Ga}$ via the ${}^{64}{Zr} (p, n)$ and ${}^{64}{Zr} (p, n γ)$ reactions

L. F. Hansen, J. C. Davis, F. S. Dietrich, M. C. Gregory, and R. P. Koopman

Phys. Rev. C 10, 1111 (1974) - Published 1 September, 1974

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The ( $p, n$ ) and ( $p, n γ$ ) reaction in ${}^{64}{Zn}$ has been studied from 8.0 up to 10.5 MeV in order to obtain the level structure of ${}^{64}{Ga}$ . The threshold of the ( $p, n$ ) reaction obtained from an excitation function of the $γ$ rays gave a $Q$ value of -7.968 ± 0.020 MeV. The measured angular distribution of the neutrons and their cross sections at 10 and 10.5 MeV were compared with the predictions of a Hauser-Feshbach calculation. These results plus the measurements of the cascade $γ$ rays among the levels and the lifetimes of some of them allowed the assignment of spins for some of the low excited levels in ${}^{64}{Ga}$ .

NUCLEAR REACTIONS ${}^{64}{Zr} (p, n)$ , ( $p, n γ$ ). $E = 8.0 - 10.5$ MeV; measured $σ_{n} (E, θ)$ , $σ_{γ} (E, θ = 90 °)$ , $γ$ lifetimes. Hauser-Feshbach analysis. ${}^{64}{Ga}$ levels, deduced $J$ , $π$ .

Asymmetric fission

Peter Fong

Phys. Rev. C 10, 1122 (1974) - Published 1 September, 1974

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The potential energy surface recently calculated by Mustafa, Mosel, and Schmitt is used for the calculation of the mass distribution curve of fission products of ${}^{235}U$ in thermal neutron fission based on the statistical theory. The results obtained agree well with the experimental curve. The physical significance of the agreement is discussed.

NUCLEAR REACTION, FISSION ${}^{235}U (n, f)$ , calculated mass distribution.

Nuclear lifetime of states in ${}^{94}{Tc}$ and ${}^{96}{Tc}$ via the pulsed-beam, direct-timing technique

F. D. McDaniel and F. D. Snyder

Phys. Rev. C 10, 1124 (1974) - Published 1 September, 1974

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The mean lifetimes of the 333 keV level in ${}^{94}{Tc}$ and the 119 and 315 keV levels in ${}^{96}{Tc}$ were measured by the pulsed-beam, direct-timing technique. The values obtained for the mean lifetimes are: $τ (333 keV) = {2.2}_{- 0.3}^{+ 0.5}$ nsec, $τ (119 keV) = {37.0}_{- 0.3}^{+ 0.6}$ nsec, and $τ (315 keV) = {2.9}_{- 0.2}^{+ 0.5}$ nsec. The transition strengths are in agreement with those for other transitions in this mass region.

NUCLEAR REACTION ${}^{94}{Mo} (p, n γ)$ , ${}^{96}{Mo} (p, n γ)$ , measured $τ$ ; pulsed-beam, direct-timing, mean lifetime, Ge(Li) detector.

Successive pickup contributions to the ${}^{98}{Mo} (d, α) {}^{96}{Nb}$ reaction

W. R. Coker, Takeshi Udagawa, and J. R. Comfort

Phys. Rev. C 10, 1130 (1974) - Published 1 September, 1974

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The mechanism for ( $(d, α)$ ) reactions is discussed, with special attention given to the ${}^{98}{Mo} (d, α) {}^{96}{Nb}$ reaction leading to the presumed [ ${(g_{\frac{9}{2}})}_{p} {(d_{\frac{5}{2}})}^{- 1}_{n}$ ] multiplet in ${}^{96}{Nb}$ . The analysis relies on the coupled-reaction-channel approach for including contributions from the successive pickup processes $(d, t) - (t, α)$ and $(d, {}^{3}{He}) - ({}^{3}{He}, α)$ . An excellent description of both the shape and magnitude of the available data is possible with adjustment of only a single parameter, namely the effective strength $D_{0}$ of the direct plus nonorthogonality terms in the reaction amplitude. The effective direct term dominates for low-spin final states of unnatural parity, while the $(d, t) - (t, α)$ term dominates for high-spin final states of natural parity. Extension of the results to the ${}^{92}{Mo} (d, α) {}^{90}{Nb}$ reaction is also discussed.

NUCLEAR REACTIONS ${}^{92, 98}{Mo} (d, α)$ , $E = 17$ MeV; calculated $σ (E_{α}, θ)$ , DWBA and coupled-reaction channels, including two-step $(d, t) - (t, α)$ and $(d, {}^{3}{He}) - ({}^{3}{He}, α)$ .

Determination of $E 2$ and $E 4$ transition moments in ${}^{232}{Th}$

C. Baktash and J. X. Saladin

Phys. Rev. C 10, 1136 (1974) - Published 1 September, 1974

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In a precision Coulomb excitation experiment, 16.5 and 17.0 MeV ${}^{4}{He}$ projectiles were employed to measure the electric quadrupole and hexadecapole transition matrix elements of the ground state rotational band of ${}^{232}{Th}$ . The results are $〈 0^{2} ∥ M (E 2) ∥ 2^{+} 〉 = 3.305 \pm 0.030$ e b and $〈 0^{2} ∥ M (E 4) ∥ 4^{+} 〉 = 1.36 \pm 0.14$ e $b^{2}$ . Model-dependent $β_{2}$ and $β_{4}$ deformation parameters are then extracted.

NUCLEAR REACTIONS ${}^{232}{Th} (α, α^{'})$ , $E = 16.5 and 17$ MeV measured $\frac{σ (E_{α^{'}})}{σ (E_{α})}$ for $θ = 143, 170.5$ ; deduced $〈 0^{+} ∥ M (E 2) ∥ 2^{+} 〉$ , $〈 0^{+} ∥ M (E 4) ∥ 4^{+} 〉$ . Extracted model-dependent deformations $β_{2}$ and $β_{4}$ .

Radiative pion capture in ${}^{209}{Bi}$

Helmut W. Baer, James A. Bistirlich, Nico de Botton, Susan Cooper, Kenneth M. Crowe, Peter Truöl, and John D. Vergados

Phys. Rev. C 10, 1140 (1974) - Published 1 September, 1974

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The photon spectrum from stopped $π^{-}$ absorption on ${}^{209}{Bi}$ was measured in the 50-150 MeV region with a high-resolution pair spectrometer. The total radiative branching ratio is 0.98 ± 0.10%. Transitions to the single-particle states of ${}^{209}{Pb}$ are weak, in agreement with calculations presented. Considerable transition strength is observed to states of ${}^{209}{Pb}$ at 6-16 MeV excitation with evidence for a narrow peak at 7.9 ± 0.4 MeV. Present evidence favors the interpretation of this peak as excitation of the analog of a $T_{>}$ giant quadrupole resonance expected at ≃26 MeV in ${}^{209}{Bi}$ .

NUCLEAR REACTIONS ${}^{209}{Bi} (π^{-}, γ)$ with stopped $π^{-}$ ; measured photon spectrum (50-150 MeV) and radiative branching ratio using pair spectrometer of 2 MeV resolution. Shell model calculations compared with measurements.

Coulomb excitation of vibrational-like states in the even- $A$ actinide nuclei

F. K. McGowan, C. E. Bemis, Jr., W. T. Milner, J. L. C. Ford, Jr., R. L. Robinson, and P. H. Stelson

Phys. Rev. C 10, 1146 (1974) - Published 1 September, 1974

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Coulomb excitation of vibrational-like states in the even- $A$ actinide nuclei ( $230 \leq A \leq 248$ ) was measured using ${}^{4}{He}$ ions in order to test nuclear models describing these states. In particular, the one-phonon octupole vibrational interpretation of the low-lying negative parity states provides an interesting theoretical framework with which to compare the experimental information. The excitation probabilities were determined relative to the elastic scattering by the observation of elastically and inelastically scattered ${}^{4}{He}$ ions using a split-pole magnetic spectrometer equipped with a position-sensitive proportional detector. The values of $B (E λ, 0_{g} \to J = λ)$ range from 0.5 to 4 single-particle units for $λ = 2$ and from 10 to 30 single-particle units for $λ = 3$ . For those cases, where the $K$ , $J^{π}$ assignments are known, the agreement between the experimental results and the microscopic calculations by Neegard and Vogel of the $B (E 3, 0 \to 3)$ for the $3^{-}$ members of the one-phonon octupole quadruplet is good when the Coriolis coupling between the states with $K$ and $K \pm 1$ is taken into account. The magnitudes of the reduced $E 0$ nuclear matrix elements, $ρ (E 0, 2^{'} \to 2_{g})$ , extracted from the $E 0$ transition probabilities, $T (E 0, 2^{'} \to 2_{g})$ , for decay of the $β$ -vibrational-like ${2'}^{+}$ state are 0.37 ± 0.06 and 0.43 ± 0.06 for ${}^{232}{Th}$ and ${}^{238}U$ , respectively. Several $2^{+}$ states observed in this Coulomb excitation reaction survey are presumed to be $2^{+}$ members of rotational bands based on $0^{+}$ excited states which are strongly populated in the ( $p, t$ ) reaction.

NUCLEAR REACTIONS ${}^{230, 232}{Th} (α, α^{'})$ , ${}^{236, 238}U (α, α^{'})$ , $E = 16 and 17$ MeV, ${}^{234}U (α, α^{'})$ , $E = 16 to 18$ MeV, ${}^{238, 240, 242, 244}{Pu} (α, α^{'})$ , ${}^{244, 246, 248}{Cm} (α, α^{'})$ , $E = 17$ MeV; measured $σ (E_{α^{'}}; θ = 150)$ ; deduced $B (E 2)$ , $B (E 3)$ . Enriched targets.

( $p, α$ ) reaction on ${}^{93}{Nb}$ and ${}^{89}Y$

Michel Vergnes, Georges Rotbard, Jacques Kalifa, and Geneviève Berrier-Ronsin

Phys. Rev. C 10, 1156 (1974) - Published 1 September, 1974

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The ( $p, α$ ) reaction has been studied at 15.2 MeV on ${}^{93}{Nb}$ and ${}^{89}Y$ and analyzed using distorted-wave Born-approximation and cluster form factors. The reaction is a direct triton pickup and compound nucleus effects are negligible. In the first case the transferred neutrons are the two extra core neutrons and the reaction behaves like a proton pickup. Positive parity states of ${}^{90}{Zr}$ are populated by the transfer of $g_{\frac{9}{2}}$ protons with strengths in good agreement with a simple model; new levels are excited corresponding to $p_{\frac{3}{2}}$ and $f_{\frac{5}{2}}$ proton holes. In the second case the neutrons are removed from the filled $N = 50$ shell; states corresponding to proton and neutron configurations in ${}^{86}{Sr}$ are excited with comparable strengths and it is difficult to get unambiguous spectroscopic information.

NUCLEAR REACTIONS ${}^{93}{Nb} (p, α)$ , ${}^{89}Y (p, α)$ , $E_{p} = 15.2$ MeV; measured $σ (E_{α}, θ)$ , $θ = 10 - 160 °$ , ${}^{90}{Zr}$ levels up to 5.1 MeV, ${}^{86}{Sr}$ levels up to 3 MeV. Reaction mechanism. DWBA analysis.

Investigation of the reorientation effect on ${}^{122}{Te}$ , ${}^{124}{Te}$ , ${}^{126}{Te}$ , ${}^{128}{Te}$ , and ${}^{130}{Te}$

J. Barrette, M. Barrette, R. Haroutunian, G. Lamoureux, and S. Monaro

Phys. Rev. C 10, 1166 (1974) - Published 1 September, 1974

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Measurements of the Coulomb excitation probabilities of the first $2^{+}$ states in ${}^{122, 124, 126, 128, 130}{Te}$ have been made with ${}^{4}{He}$ and ${}^{16}O$ projectiles. The values of the reduced transition probabilities $B (E 2; 0^{+} \to 2^{+})$ and the static quadrupole moments of the first $2^{+}$ states have been determined. The measurements yield for $Q_{2^{+}}$ and $B (E 2; 0^{+} \to 2^{+})$ : (-0.44 ± 0.10) e b or (-0.22 ± 0.10) e b and (0.666 ± 0.011) $e^{2}$ $b^{2}$ for ${}^{122}{Te}$ ; (-0.46 ± 0.10) e b or (-0.11 ± 0.10) e b and (0.569 ± 0.011) $e^{2}$ $b^{2}$ for ${}^{124}{Te}$ ; (-0.28 ± 0.10) e b or (-0.20 ± 0.10) e b and (0.479 ± 0.011) $e^{2}$ $b^{2}$ for ${}^{126}{Te}$ ; (-0.33 ± 0.11) e b or (-0.26 ± 0.11) e b and (0.387 ± 0.011) $e^{2}$ $b^{2}$ for ${}^{128}{Te}$ ; (-0.14 ± 0.12) e b or (-0.09 ± 0.12) e b and (0.290 ± 0.011) $e^{2}$ $b^{2}$ for ${}^{130}{Te}$ .

Identification and decay characteristics of ${}^{132}I^{m}$

M. Dikšić, L. Yaffe, and D. G. Sarantites

Phys. Rev. C 10, 1172 (1974) - Published 1 September, 1974

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The 83.6-min isomer of ${}^{132}I$ has been produced both by fission of uranium with medium-energy (30-85 MeV) protons and by the reaction ${}^{130}{Te} (α, p n) {}^{132}I$ , using tellurium enriched in mass 130. The isomeric transition is by a 98-keV $γ$ ray (86%), the remainder decaying by $β^{-}$ emission to levels in ${}^{132}{Xe}$ . Three new levels, viz. 2650.1 ± 0.9, 2829.1 ± 0.9, and 2960.1 ± 1.2 keV in ${}^{132}{Xe}$ have been found. A decay scheme for ${}^{132}I^{m}$ is presented.

RADIOACTIVITY ${}^{132}I^{m}$ ; produced in medium-energy proton fission ${}^{238}U$ and reaction ${}^{130}{Te} (α, p n)$ , measured $T_{\frac{1}{2}}$ , IT, ${}^{132}{Xe}$ deduced levels, decay scheme ${}^{132}I^{m}$ .

Decay properties of the neutron-rich isotopes, ${}^{11}{Li}$ and ${}^{27 - 31}{Na}$

E. Roeckl, P. F. Dittner, C. Détraz, R. Klapisch, C. Thibault, and C. Rigaud

Phys. Rev. C 10, 1181 (1974) - Published 1 September, 1974

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Using an on-line mass spectrometer the decay properties of the $T_{z} \geq \frac{5}{2}$ nuclei ${}^{11}{Li}$ , ${}^{27 - 31}{Na}$ , ${}^{29, 30}{Mg}$ were studied. The new isotope ${}^{30}{Mg}$ ( $T_{\frac{1}{2}} = 1200 \pm 500$ msec) identified by $β$ counting. For the other isotopes the half-lives were remeasured by three independent methods with improved precision. By recording $β$ -coincident $γ$ spectra, the decays of ${}^{27 - 29}{Na}$ were studied, leading to a $1^{+}$ assignment for the ${}^{28}{Na}$ ground state. By simultaneous $β$ and neutron multiscaling the delayed neutron emission probabilities $P_{n}$ were determined for ${}^{11}{Li}$ and ${}^{27 - 31}{Na}$ . The following half-lives (msec) and $P_{n}$ values (%) were found (errors see text): ${}^{11}{Li}$ (8.5/60.8), ${}^{27}{Na}$ (304/0.08), ${}^{28}{Na}$ (30.5/0.58), ${}^{29}{Na}$ (42.9/15.1), ${}^{30}{Na}$ (53.0/33.1), ${}^{31}{Na}$ (16.9/30).

RADIOACTIVITY ${}^{9, 11}{Li}$ , ${}^{27, 28, 29, 30, 31}{Na}$ , ${}^{29, 30}{Mg}$ ; measured $T_{\frac{1}{2}}$ , $E_{β}$ , $β γ$ coin, delayed neutrons; deduced $E_{γ}$ , $I_{γ}$ , $log ft$ , $Q$ , $J$ , $π$ , $P_{n}$ . On-line mass separation.

Generator-coordinate spectra of $4 n$ nuclei in $d - s$ shell

S. B. Khadkikar and D. R. Kulkarni

Phys. Rev. C 10, 1189 (1974) - Published 1 September, 1974

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The calculated energy spectra, quadrupole moments, and quadrupole transitions for $4 n$ nuclei in $d - s$ shell are reported. The framework of the generator coordinate method using angular momentum projected states from Hartree-Fock intrinsic states driven by an external quadrupole field is successfully employed. The agreement with experimental numbers is found to be quite satisfactory up to the middle of the $d - s$ shell. The excited $0^{+}$ levels and the electrical moments are satisfactorily explained.

NUCLEAR STRUCTURE ${}^{20}{Ne}$ , ${}^{24}{Mg}$ , ${}^{28}{Si}$ , ${}^{32}S$ , ${}^{36}{Ar}$ ; calculated levels $J$ , $q$ , $B (E 2)$ . Generator coordinate method; constrained Hartree-Fock.

$\frac{E 2}{M 1}$ multipole mixing ratios of $2^{'} \to 2$ gamma transitions in even-even spherical nuclei

K. S. Krane

Phys. Rev. C 10, 1197 (1974) - Published 1 September, 1974

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A systematic survey is presented of $\frac{E 2}{M 1}$ mixing ratios of $γ$ transitions between the $2^{+}$ ′ and $2^{+}$ levels of even-even nuclei in the mass range $58 \leq A \leq 152$ . Particular attention is given to the variations in the phase of the mixing ratios, which are deduced from the literature in a systematic manner. It is shown that the systematics of both magnitudes and phases of the mixing ratios are explained quite well for a number of nuclei by a model proposed by Greiner, in which the magnitude of the mixing ratio is parametrized in terms of the deviation of the $g$ factor of the first $2^{+}$ state from the value $\frac{Z}{A}$ . It is further shown that a semimicroscopic description, in terms of small admixtures of two-particle components to the phonon basis states, yields reasonable agreement with the observed phase variations and absolute magnitudes, even when only very few two-particle states are considered.

NUCLEAR STRUCTURE ${}^{58, 60, 62}{Ni}$ , ${}^{64, 66, 68}{Zn}$ , ${}^{70, 72, 74, 76}{Ge}$ , ${}^{74, 76, 78}{Se}$ , ${}^{80, 82, 84}{Kr}$ , ${}^{84, 86, 88}{Sr}$ , ${}^{92}{Zr}$ , ${}^{94, 96, 98}{Mo}$ , ${}^{100, 102, 104}{Ru}$ , ${}^{104, 106, 110}{Pd}$ , ${}^{106, 108, 110, 112, 114, 116}{Cd}$ , ${}^{116}{Sn}$ , ${}^{122, 124, 126}{Te}$ , ${}^{126, 128, 132}{Xe}$ , ${}^{132, 134}{Ba}$ , ${}^{140, 142}{Ce}$ , ${}^{144}{Nd}$ , ${}^{150}{Sm}$ , ${}^{152}{Gd}$ ; calculated $\frac{E 2}{M 1}$ mixing ratio $δ$ .

Dip in the ${}^{12}C ({}^{12}C, α) {}^{20}{Ne}$ cross section at $E_{c . m .} = 19.2$ MeV

L. R. Greenwood, H. T. Fortune, R. E. Segel, and J. R. Erskine

Phys. Rev. C 10, 1211 (1974) - Published 1 September, 1974

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In most of the excitation functions for the ${}^{12}C ({}^{12}C, α) {}^{20}{Ne}$ reaction to levels of ${}^{20}{Ne}$ below $E_{x} = 17$ MeV, a pronounced minimum occurs at a center-of-mass (c.m.) bombarding energy of 19.2 MeV. The c.m. width is 400-500 keV. This structure is very likely due to the resonance reported by Van Bibber et al. in the ${}^{12}C ({}^{12}C, p) {}^{23}{Na}$ reaction at an energy of 19.3 MeV, with a width of ∼500 keV.

NUCLEAR REACTIONS ${}^{12}C ({}^{12}C, α)$ , $E = 36 - 51$ MeV. Measured $σ (E)$ at $θ = 5 °$ (lab) for 22 levels.

Mean lives in ${}^{38}{Cl}$

J. D. McCullen and L. C. McIntyre, Jr.

Phys. Rev. C 10, 1213 (1974) - Published 1 September, 1974

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Mean lives of eight states in ${}^{38}{Cl}$ have been measured using the ${}^{37}{Cl} (d, p γ) {}^{38}{Cl}$ reaction at 3 MeV incident energy. The Doppler-shift attenuation method was used. Results are (levels in keV, and mean lives in fs): 755 (325 ± 35), 1309 (510 ± 45), 1617 ( $1110_{- 130}^{+ 190}$ ), 1692 ( $1330_{- 190}^{+ 240}$ ), 1745 ( $640_{- 110}^{+ 180}$ ), 1785 (100 ± 15), 1981 (330 ± 25), 2743 (≤30).

NUCLEAR REACTIONS ${}^{37}{Cl} (d, p γ) {}^{38}{Cl}$ , $E = 3.0$ MeV; measured Doppler shifts, deduced $T_{\frac{1}{2}}$ for 8 levels.

Induced Coulomb corrections to nuclear beta decay

Barry R. Holstein

Phys. Rev. C 10, 1215 (1974) - Published 1 September, 1974

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Physical Review C

Recent Articles

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Recent Issues

Energy dependence of the volume integrals of the ${}^{3}{He}$ optical potential

Elastic and inelastic scattering of 1.5-MeV neutrons by the even- $A$ isotopes of zirconium and molybdenum

${}^{238}U$ giant resonances and the ${}^{238}U (p, p^{'})$ reaction at $E_{p} = 66$ MeV

Two-proton transfer reactions induced by 56-MeV ${}^{16}O$ heavy-ion beam on ${}^{64}{Ni}$ and ${}^{76}{Ge}$ target isotopes

Levels of ${}^{64}{Ga}$ via the ${}^{64}{Zr} (p, n)$ and ${}^{64}{Zr} (p, n γ)$ reactions

Asymmetric fission

Nuclear lifetime of states in ${}^{94}{Tc}$ and ${}^{96}{Tc}$ via the pulsed-beam, direct-timing technique

Successive pickup contributions to the ${}^{98}{Mo} (d, α) {}^{96}{Nb}$ reaction

Determination of $E 2$ and $E 4$ transition moments in ${}^{232}{Th}$

Radiative pion capture in ${}^{209}{Bi}$

Coulomb excitation of vibrational-like states in the even- $A$ actinide nuclei

( $p, α$ ) reaction on ${}^{93}{Nb}$ and ${}^{89}Y$

Investigation of the reorientation effect on ${}^{122}{Te}$ , ${}^{124}{Te}$ , ${}^{126}{Te}$ , ${}^{128}{Te}$ , and ${}^{130}{Te}$

Identification and decay characteristics of ${}^{132}I^{m}$

Decay properties of the neutron-rich isotopes, ${}^{11}{Li}$ and ${}^{27 - 31}{Na}$

Generator-coordinate spectra of $4 n$ nuclei in $d - s$ shell

$\frac{E 2}{M 1}$ multipole mixing ratios of $2^{'} \to 2$ gamma transitions in even-even spherical nuclei

Dip in the ${}^{12}C ({}^{12}C, α) {}^{20}{Ne}$ cross section at $E_{c . m .} = 19.2$ MeV

Mean lives in ${}^{38}{Cl}$

Induced Coulomb corrections to nuclear beta decay

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