β-delayed neutron spectroscopy of Co70,72 ground-state and isomeric-state decays

Siegl, K.; Keeler, A. M.; Grzywacz, R.; Brewer, N. T.; Crider, B. P.; Fijalkowska, A.; Go, S.; Hall, M.; Hamilton, J. H.; Ilyushkin, S. V.; King, T.; Liddick, S.; Madurga, M.; O'Malley, P. D.; Paulauskas, S. V.; Rajabali, M. M.; Taylor, S. Z.; Wang, E. H.; Xu, Z. Y.; Zachary, C.

doi:10.1103/physrevc.109.064309

β -delayed neutron spectroscopy of Co 70,72 ground-state and isomeric-state decays

Journal Article · Mon Jun 10 00:00:00 EDT 2024 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.109.064309· OSTI ID:2438847

^[1]; Keeler, A. M. ^[2]; Grzywacz, R. ^[3]; ^[4]; Crider, B. P. ^[5]; ^[6]; Go, S. ^[1]; Hall, M. ^[7]; Hamilton, J. H. ^[8]; ^[9]; ^[1]; Liddick, S. ^[10]; Madurga, M. ^[1]; O'Malley, P. D. ^[7]; Paulauskas, S. V. ^[1]; Rajabali, M. M. ^[11]; Taylor, S. Z. ^[1]; Wang, E. H. ^[8]; ^[1]; Zachary, C. ^[8]

Univ. of Tennessee, Knoxville, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States); Loyola University, Chicago, IL (United States)
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory; Mississippi State Univ., Mississippi State, MS (United States)
Rutgers Univ., New Brunswick, NJ (United States); Univ. of Warsaw (Poland)
University of Notre Dame, IN (United States)
Vanderbilt Univ., Nashville, TN (United States)
Colorado School of Mines, Golden, CO (United States)
Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Laboratory
Tennessee Technological Univ., Cookeville, TN (United States)

Here, the β-decaying states of ^70,72Co were studied at the National Superconducting Cyclotron Laboratory using the VANDLE neutron time-of-flight array. The (6^-,7^-)⁢β-decaying state in ⁷⁰Co is near-spherical with a lifetime of 113 ± 7 ms, and the low-spin (1⁺,2⁺)⁢β-decaying state is postulated to be the prolate deformed ground state with a lifetime of 508 ± 7 ms. Both decay predominantly to the bound states of ⁷⁰Ni. For the first time neutron-emissions from neutron unbound states from both the (6^-,7^-) and (1⁺,2⁺)⁢β decays were measured. Even with the low statistics data, we were able to disentangle the neutron emission from both decays, which enabled a determination of β-decay strength above the neutron separation energy of ⁷⁰Ni. Neutron emission probabilities were measured to be 7.1 ± 1.5% and 9.4 ± 1.7%, respectively, for the (6^-,7^-) and (1⁺,2⁺) decays. The decay pattern of the ⁷⁰Co is driven by neutron f_5/2 to proton f_7/2 Gamow-Teller transformation. The observed population of neutron unbound states is attributed to the conversion of p_1/2 and p_3/2 neutrons to p_3/2 and p_1/2 protons excited across the Z = 28 closed shell.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

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

Grant/Contract Number:: AC05-00OR22725; FG02-96ER40983; NA0003899

OSTI ID:: 2438847

Alternate ID(s):: OSTI ID: 2474115

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 6 Vol. 109; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (28)

The response of NE-228A, NE-228, NE-224, and NE-102 scintillators to protons from 2.43 to 19.55 MeV Madey, Richard; Waterman, Frank M.; Baldwin, Alan R. Nuclear Instruments and Methods, Vol. 151, Issue 3 https://doi.org/10.1016/0029-554X(78)90154-4	journal	May 1978
Total absorption gamma-ray spectrometer for measurement of beta-decay intensity distributions for fission product radionuclides Greenwood, R. C.; Helmer, R. G.; Lee, M. A. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 314, Issue 3 https://doi.org/10.1016/0168-9002(92)90243-W	journal	May 1992
Commissioning the A1900 projectile fragment separator Morrissey, D. J.; Sherrill, B. M.; Steiner, M. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 204 https://doi.org/10.1016/S0168-583X(02)01895-5	journal	May 2003
Nuclear Data Sheets for A = 70 Gürdal, G.; McCutchan, E. A. Nuclear Data Sheets, Vol. 136 https://doi.org/10.1016/j.nds.2016.08.001	journal	September 2016
The influence of the unknown de-excitation pattern in the analysis of -decay total absorption spectra Tain, J. L.; Cano-Ott, D. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 571, Issue 3 https://doi.org/10.1016/j.nima.2006.09.084	journal	February 2007
Performance of the Versatile Array of Neutron Detectors at Low Energy (VANDLE) Peters, W. A.; Ilyushkin, S.; Madurga, M. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 836 https://doi.org/10.1016/j.nima.2016.08.054	journal	November 2016
Type II shell evolution in A = 70 isobars from the N ≥ 40 island of inversion Morales, A. I.; Benzoni, G.; Watanabe, H. Physics Letters B, Vol. 765 https://doi.org/10.1016/j.physletb.2016.12.025	journal	February 2017
Scintillation Camera Anger, Hal O. Review of Scientific Instruments, Vol. 29, Issue 1 https://doi.org/10.1063/1.1715998	journal	January 1958
Monte Carlo Simulation for Particle and γ-Ray Emissions in Statistical Hauser-Feshbach Model Kawano, Toshihiko; Talou, Patrick; Chadwick, Mark B. Journal of Nuclear Science and Technology, Vol. 47, Issue 5 https://doi.org/10.1080/18811248.2010.9711637	journal	May 2010
Scintillations from Organic Crystals: Specific Fluorescence and Relative Response to Different Radiations Birks, J. B. Proceedings of the Physical Society. Section A, Vol. 64, Issue 10 https://doi.org/10.1088/0370-1298/64/10/303	journal	October 1951
Shell structure of the neutron-rich isotopes Co 69 , 71 , 73 Lokotko, T.; Leblond, S.; Lee, J. Physical Review C, Vol. 101, Issue 3 https://doi.org/10.1103/PhysRevC.101.034314	journal	March 2020
Extension of the Hauser-Feshbach fission fragment decay model to multichance fission Lovell, A. E.; Kawano, T.; Okumura, S. Physical Review C, Vol. 103, Issue 1 https://doi.org/10.1103/PhysRevC.103.014615	journal	January 2021
β -delayed neutron spectroscopy of In133 Xu, Z. Y.; Madurga, M.; Grzywacz, R. Physical Review C, Vol. 108, Issue 1 https://doi.org/10.1103/PhysRevC.108.014314	journal	July 2023
β decay of 66 Co , 68 Co , and 70 Co Mueller, W. F.; Bruyneel, B.; Franchoo, S. Physical Review C, Vol. 61, Issue 5 https://doi.org/10.1103/PhysRevC.61.054308	journal	April 2000
Fine structure of the Gamow-Teller resonance revealed in the decay of 150 Ho 2 − isomer Algora, A.; Rubio, B.; Cano-Ott, D. Physical Review C, Vol. 68, Issue 3 https://doi.org/10.1103/PhysRevC.68.034301	journal	September 2003
Low energy levels in Ni 72 Sawicka, M.; Grzywacz, R.; Matea, I. Physical Review C, Vol. 68, Issue 4 https://doi.org/10.1103/PhysRevC.68.044304	journal	October 2003
Collectivity at N = 40 in neutron-rich Cr 64 Gade, A.; Janssens, R. V. F.; Baugher, T. Physical Review C, Vol. 81, Issue 5 https://doi.org/10.1103/PhysRevC.81.051304	journal	May 2010
Spectroscopy of odd-mass cobalt isotopes toward the N = 40 subshell closure and shell-model description of spherical and deformed states Recchia, F.; Lenzi, S. M.; Lunardi, S. Physical Review C, Vol. 85, Issue 6 https://doi.org/10.1103/PhysRevC.85.064305	journal	June 2012
Shape coexistence in Ni 68 Suchyta, S.; Liddick, S. N.; Tsunoda, Y. Physical Review C, Vol. 89, Issue 2 https://doi.org/10.1103/PhysRevC.89.021301	journal	February 2014
New low-energy 0 + state and shape coexistence in Ni 70 Prokop, C. J.; Crider, B. P.; Liddick, S. N. Physical Review C, Vol. 92, Issue 6 https://doi.org/10.1103/PhysRevC.92.061302	journal	December 2015
Statistical Hauser-Feshbach theory with width-fluctuation correction including direct reaction channels for neutron-induced reactions at low energies Kawano, T.; Capote, R.; Hilaire, S. Physical Review C, Vol. 94, Issue 1 https://doi.org/10.1103/PhysRevC.94.014612	journal	July 2016
Simultaneous investigation of the T = 1 ( J π = 0 + ) and T = 0 ( J π = 9 + ) β decays in Br 70 Morales, A. I.; Algora, A.; Rubio, B. Physical Review C, Vol. 95, Issue 6 https://doi.org/10.1103/PhysRevC.95.064327	journal	June 2017
Strong Neutron- γ Competition above the Neutron Threshold in the Decay of Co 70 Spyrou, A.; Liddick, S. N.; Naqvi, F. Physical Review Letters, Vol. 117, Issue 14 https://doi.org/10.1103/PhysRevLett.117.142701	journal	September 2016
In133 : A Rosetta Stone for Decays of r -Process Nuclei Xu, Z. Y.; Madurga, M.; Grzywacz, R. Physical Review Letters, Vol. 131, Issue 2 https://doi.org/10.1103/PhysRevLett.131.022501	journal	July 2023
N = 40 Neutron Subshell Closure in the Ni 68 Nucleus Broda, R.; Fornal, B.; Królas, W. Physical Review Letters, Vol. 74, Issue 6 https://doi.org/10.1103/PhysRevLett.74.868	journal	February 1995
Magicity of the N 68 i Semidouble-Closed-Shell Nucleus Probed by Gamow-Teller Decay of the Odd- A Neighbors Mueller, W. F.; Bruyneel, B.; Franchoo, S. Physical Review Letters, Vol. 83, Issue 18 https://doi.org/10.1103/PhysRevLett.83.3613	journal	November 1999
Evolution of Nuclear Shells due to the Tensor Force Otsuka, Takaharu; Suzuki, Toshio; Fujimoto, Rintaro Physical Review Letters, Vol. 95, Issue 23 https://doi.org/10.1103/PhysRevLett.95.232502	journal	November 2005
Astromers: Nuclear Isomers in Astrophysics Misch, G. Wendell; Ghorui, Surja K.; Banerjee, Projjwal The Astrophysical Journal Supplement Series, Vol. 252, Issue 1 https://doi.org/10.3847/1538-4365/abc41d	journal	December 2020

Similar Records

Low spin spectroscopy of neutron-rich Cl43,44,45 via β- and βn decay

Journal Article · Wed Apr 17 00:00:00 EDT 2024 · Physical Review. C · OSTI ID:2375409

Persistence of the Z=28 shell gap in A=75 isobars: Identification of a possible (1/2–) μs isomer in Co75 and β decay to Ni75

Journal Article · Mon Jun 28 00:00:00 EDT 2021 · Physical Review. C · OSTI ID:1850007

β -delayed neutron emission of Mn64, Cr62 , and Fe65

Journal Article · Tue Aug 27 00:00:00 EDT 2024 · Physical Review. C · OSTI ID:2438190

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS

β -delayed neutron spectroscopy of Co 70,72 ground-state and isomeric-state decays

Citation Formats

References (28)

Similar Records

Related Subjects