Nuclear structure of 157Sm via 𝛽−decay of 157Pm

Hartley, D. J.; Kondev, F. G.; Carpenter, M. P.; Clark, J. A.; Copp, P.; Kay, B. P.; Lauritsen, T.; Leland, A.; Savard, G.; Seweryniak, D.; Wilson, G. L.; Wu, J.

doi:10.1103/physrevc.110.044319

Nuclear structure of ¹⁵⁷Sm via 𝛽−decay of ¹⁵⁷Pm

Journal Article · Wed Oct 23 00:00:00 EDT 2024 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.110.044319· OSTI ID:2998699

^[1]; ^[2]; ^[2]; Clark, J. A. ^[3]; Copp, P. ^[4]; ^[2]; Lauritsen, T. ^[2]; Leland, A. ^[1]; ^[5]; Seweryniak, D. ^[2]; ^[6]; Wu, J. ^[2]

US Naval Academy, Annapolis, MD (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Manitoba, Winnipeg, MB (Canada)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
Argonne National Laboratory (ANL), Argonne, IL (United States); Louisiana State Univ., Baton Rouge, LA (United States)

Excited states of the neutron-rich nucleus ¹⁵⁷Sm were populated through the 𝛽−decay of ¹⁵⁷Pm , which has a tentatively assigned ground-state spin and parity of 𝐽^𝜋=(5/2⁻). Over 30 levels have been observed, 16 of which are new, and over 45 new 𝛾-ray transitions have been placed in the level scheme. An evolution in the ground-state configurations for 𝑁 = 95 nuclei from 5/2⁻⁢[523] (Er/Yb), to 5/2⁺⁢[642] (Dy), to 3/2⁻⁢[521] (Sm/Gd) can be explained based on increasing deformation from 𝑍 = 70 to 𝑍 = 62 and the fact that these three orbitals are energetically close to each other at deformations near 𝛽₂ ≈ 0.25–0.3. Finally, tentative spin and parity assignments are made for most of the states below 1500 keV based on the decay properties of the levels and using excitation-energy systematics of the various orbitals observed in 𝑁 = 95 nuclei.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation; USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 2998699

Alternate ID(s):: OSTI ID: 2473444

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 4 Vol. 110; ISSN 2469-9985; ISSN 2469-9993

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (24)

Transition Probability from the Ground to the First-Excited 2+ State of Even–Even Nuclides Raman, S.; Nestor, C. W.; Tikkanen, P. Atomic Data and Nuclear Data Tables, Vol. 78, Issue 1 https://doi.org/10.1006/adnd.2001.0858	journal	May 2001
Nuclear moments and charge radii of rare-earth isotopes studied by collinear fast-beam laser spectroscopy Neugart, R.; Wendt, K.; Ahmad, S. A. Hyperfine Interactions, Vol. 15, Issue 1-4 https://doi.org/10.1007/BF02159736	journal	December 1983
Allowed spin-flip beta decays in medium-heavy (147 ≤ A ≤ 190) nuclei Sood, P. C.; Sheline, R. K. Atomic Data and Nuclear Data Tables, Vol. 43, Issue 2 https://doi.org/10.1016/0092-640X(89)90003-X	journal	November 1989
Ground-state β−-branching intensities of several fission-product isotopes measured using a total absorption γ-ray spectrometer Greenwood, R. C.; Putnam, M. H.; Watts, K. D. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 378, Issue 1-2 https://doi.org/10.1016/0168-9002(96)00209-4	journal	August 1996
Measurement of β−-decay intensity distributions of several fission-product isotopes using a total absorption γ-ray spectrometer Greenwood, R. C.; Helmer, R. G.; Putnam, M. H. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 390, Issue 1-2 https://doi.org/10.1016/S0168-9002(97)00356-2	journal	May 1997
Nuclear ground-state masses and deformations: FRDM(2012) Möller, P.; Sierk, A. J.; Ichikawa, T. Atomic Data and Nuclear Data Tables, Vol. 109-110 https://doi.org/10.1016/j.adt.2015.10.002	journal	May 2016
Nuclear Data Sheets for A = 163 Reich, C. W.; Singh, Balraj Nuclear Data Sheets, Vol. 111, Issue 5 https://doi.org/10.1016/j.nds.2010.04.001	journal	May 2010
Nuclear Data Sheets for A = 161 Reich, C. W. Nuclear Data Sheets, Vol. 112, Issue 10 https://doi.org/10.1016/j.nds.2011.09.001	journal	October 2011
Nuclear Data Sheets for A = 36 Nica, Ninel; Cameron, John; Singh, Balraj Nuclear Data Sheets, Vol. 113, Issue 1 https://doi.org/10.1016/j.nds.2012.01.001	journal	January 2012
Nuclear Data Sheets for A = 157 Nica, N. Nuclear Data Sheets, Vol. 132 https://doi.org/10.1016/j.nds.2016.01.001	journal	February 2016
Nuclear Data Sheets for A=155 Nica, N. Nuclear Data Sheets, Vol. 160 https://doi.org/10.1016/j.nds.2019.100523	journal	September 2019
Nuclear Data Sheets for A=153 Nica, N. Nuclear Data Sheets, Vol. 170 https://doi.org/10.1016/j.nds.2020.11.001	journal	December 2020
The X-Array and SATURN: A new decay-spectroscopy station for CARIBU Mitchell, A. J.; Bertone, P. F.; DiGiovine, B. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 763 https://doi.org/10.1016/j.nima.2014.06.024	journal	November 2014
Radioactive beams from gas catchers: The CARIBU facility Savard, G.; Baker, S.; Davids, C. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 266, Issue 19-20 https://doi.org/10.1016/j.nimb.2008.05.091	journal	October 2008
Reverse engineering nuclear properties from rare earth abundances in the r process Mumpower, M. R.; McLaughlin, G. C.; Surman, R. Journal of Physics G: Nuclear and Particle Physics, Vol. 44, Issue 3 https://doi.org/10.1088/1361-6471/44/3/034003	journal	February 2017
The AME 2020 atomic mass evaluation (II). Tables, graphs and references* Wang, Meng; Huang, W. J.; Kondev, F. G. Chinese Physics C, Vol. 45, Issue 3 https://doi.org/10.1088/1674-1137/abddaf	journal	March 2021
Atomic-Beam Investigations of Electronic and Nuclear Ground States in the Rare-Earth Region Cabezas, Amado Y.; Lindgren, Ingvar; Marrus, Richard Physical Review, Vol. 122, Issue 6 https://doi.org/10.1103/PhysRev.122.1796	journal	June 1961
νi13/2 structures in Sm155 and Gd159 : Supporting evidence of a Z=60 deformed subshell gap Hartley, D. J.; Kondev, F. G.; Carpenter, M. P. Physical Review C, Vol. 105, Issue 1 https://doi.org/10.1103/PhysRevC.105.014301	journal	January 2022
First β− -decay spectroscopy study of Nd157 Hartley, D. J.; Kondev, F. G.; Carpenter, M. P. Physical Review C, Vol. 108, Issue 2 https://doi.org/10.1103/PhysRevC.108.024307	journal	August 2023
Nuclear levels inDy161by the (d, p), (d, t), and (n, γ) reactions Bennett, M. J.; Sheline, R. K. Physical Review C, Vol. 15, Issue 1 https://doi.org/10.1103/PhysRevC.15.146	journal	January 1977
Formation of the rare-earth peak: Gaining insight into late-time r -process dynamics Mumpower, Matthew R.; McLaughlin, G. C.; Surman, Rebecca Physical Review C, Vol. 85, Issue 4 https://doi.org/10.1103/PhysRevC.85.045801	journal	April 2012
Influence of neutron capture rates in the rare earth region on the r -process abundance pattern Mumpower, Matthew R.; McLaughlin, Gail C.; Surman, Rebecca Physical Review C, Vol. 86, Issue 3 https://doi.org/10.1103/PhysRevC.86.035803	journal	September 2012
Source of the Rare-Earth Element Peak in r -Process Nucleosynthesis Surman, Rebecca; Engel, Jonathan; Bennett, Jonathan R. Physical Review Letters, Vol. 79, Issue 10 https://doi.org/10.1103/PhysRevLett.79.1809	journal	September 1997
A Survey of Nonrotational States of Deformed Odd- A Nuclei ( 150 < A < 190 ) Bunker, M. E.; Reich, C. W. Reviews of Modern Physics, Vol. 43, Issue 3 https://doi.org/10.1103/RevModPhys.43.348	journal	July 1971

Similar Records

Nuclear structure of ¹⁵⁷Sm via β^– decay of ¹⁵⁷Pm

Technical Report · Tue Oct 01 00:00:00 EDT 2024 · OSTI ID:2475966

Charge radii and electromagnetic moments of ^214−218Bi : Exploring the “southern” border of the 𝑍 > 82 octupole-deformation region

Journal Article · Wed Sep 03 20:00:00 EDT 2025 · Physical Review. C · OSTI ID:3004102

Related Subjects

beta decay
collective levels
electromagnetic transitions
energy levels
lifetimes & widths
nuclear parity
nuclear spin
nuclear structure & decays

Nuclear structure of 157Sm via 𝛽−decay of 157Pm

Citation Formats

References (24)

Similar Records

Related Subjects

Nuclear structure of ¹⁵⁷Sm via 𝛽−decay of ¹⁵⁷Pm