Journal
PHYSICAL REVIEW C
Volume 105, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.105.034331
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Funding
- NP1712-RRC37R1 at the RIBF [JP23244060, JP24740180, JP26247044, JP15H02096, JP17H01132, JP17H06090, JP18H03711, JP18K03631]
- JSPS KAKENHI [ST/P005314/1]
- United Kingdom STFC [11921006, 11835001]
- NSFC [682841]
- ERC [DE-AC02-06CH11357 5]
- U.S. Department of Energy, Office of Nuclear Physics
- RIKEN's SPDR fellowship
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Beta-decay spectroscopy of the Ta-187 ground state was performed, and the beta-decay branching ratio and log(ft) values were evaluated for the first time. The spin-parity values of I-pi = 7/2(+) were determined with high confidence, consistent with the systematics of neighboring odd-A nuclides.
Beta-decay spectroscopy of the Ta-187 ground state was performed at the KEK Isotope Separation System. beta-delayed gamma rays corresponding to the previously reported in-beam transitions were observed. The beta-decay half-life of the Ta-187 ground state was determined to be 283(10) s by analyzing a time spectrum of beta-gamma coincidence events. The beta-decay branching ratio and log(ft) values were evaluated for the first time. Based on the newly evaluated log(ft) values of >6.0 and a decay scheme, spin-parity values of I-pi = 7/2(+) originating from the odd-proton orbit pi 7/2[404] were assigned with high confidence, which is consistent with the systematics of neighboring odd-A nuclides.
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