出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We measure half-lives of the ground state of 184Re and an isomer in 164Ho, which are populated
by (g ,n) reactions with laser Compton scattering (LCS) g -ray source at NewSUBARU. These
neutron-deficient isotopes are located on nucleosynthesis flows of the supernova g process. The
measured half-life of 35.4 § 0.3 d for 184Re is shorter than the previous half-life of T1=2 = 38.0
§ 0.5 by about 7%. The half-life of the 164Ho isomer is 36.4 § 0.3 min. This is about 3%
shorter than a recommended value T1=2 = 37.5 +1:5
¡0:5 min. These results indicate that half-lives of
all unstable nuclei near the b stability line may be not robust and that the LCS g -rays are useful
for precise determination of the half-lives.
