Low-lying level structure of <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>Pm</mi><mprescripts></mprescripts><none></none><mn>150</mn></mmultiscripts></math> from the <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mo>(</mo><mi>d</mi><mo>,</mo><mi>α</mi><mo>)</mo></mrow></math> reaction

D. Bucurescu; S. Pascu; R. Lică; D. Filipescu; R. Hertenberger; H.-F. Wirth; T. Faestermann; M. Spieker; K. Nomura; A. Pal; T. Bhattacharjee

doi:10.1103/6pk7-k3bk

Low-lying level structure of ${}^{150}{Pm}$ from the $(d, α)$ reaction

D. Bucurescu ^1,*, S. Pascu ¹, R. Lică ¹, D. Filipescu ¹, R. Hertenberger ², H.-F. Wirth ², T. Faestermann ³, M. Spieker ⁴, K. Nomura ^5,6 et al.

A. Pal ^7,8 and T. Bhattacharjee ^7,8

¹National Institute for Physics and Nuclear Engineering, R-77125, Bucharest-Magurele, Romania
²Fakultät für Physik, Ludwig-Maximilians-Universität München, Garching, Germany
³Technical University of Munich, Physics Department, D85748 Garching, Germany
⁴Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
⁵Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
⁶Nuclear Reaction Data Center, Hokkaido University, Sapporo 060-0810, Japan
⁷Variable Energy Cyclotron Centre, Kolkata - 700 064, India
⁸Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400 094, India

^*Contact author: bucurescu@nipne.ro

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Phys. Rev. C 114, 024321 – Published 12 August, 2026

DOI: https://doi.org/10.1103/6pk7-k3bk

Abstract

A study of the $N = 89$ odd-odd nucleus ${}^{150}{Pm}$ with the ${}^{152}{Sm} (d, α)$ reaction at 18 MeV incident energy is presented. A distorted-wave Born approximation (DWBA) analysis of measured angular distributions has been performed for 48 states observed in this nucleus up to $E_{x} \approx 1.4$ MeV, yielding information on their possible spin and parity values. Albeit not unique due to inherent ambiguities of the DWBA analysis, these assignments are the only ones existing now for this nucleus, for which $J^{π}$ values were previously proposed for only two states. A comparison of the observed states is made with theoretical calculations, performed with the Interacting boson-fermion-Fermion Model-2, and the Shell Model, respectively. These results are a first step to a better understanding of the structure of the odd-odd nuclei around the shape phase transition critical point at $N = 90$ .

Physical Review C

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Low-lying level structure of ${}^{150}{Pm}$ from the $(d, α)$ reaction

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Low-lying level structure of Pm150 from the (d,α) reaction

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Low-lying level structure of ${}^{150}{Pm}$ from the $(d, α)$ reaction