Other
Scientific paper
Mar 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phrvc..65c4313s&link_type=abstract
Physical Review C, vol. 65, Issue 3, id. 034313
Other
33
Beta Decay, Double Beta Decay, Electron And Muon Capture, Spectrometers And Spectroscopic Techniques, Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments, 90<=A<=149
Scientific paper
The decays of the very neutron rich Sn isotopes 135-137Sn were studied at CERN/ISOLDE using isotopic and isobaric selectivity achieved by the use of a resonance ionization laser ion source and mass spectroscopy, respectively. Neutron decay rates, γ-ray singles, and γ-γ coincidence data were collected as a function of time. The half-life (T1/2) and delayed neutron emission probability (Pn) values of 135Sn were measured to be 530(20) ms and 21(3)%, respectively. For 136Sn, a T1/2 of 250(30) ms was determined along with a Pn value of 30(5)%. For 137Sn, a T1/2 of 190(60) ms and a Pn value of 58(15)% were deduced. Identification of low-energy transitions in 135Sb was made possible by comparison of laser-on and laser-off γ-ray spectra. Those data combined with γ-γ coincidence spectra were used to construct a level scheme for 135Sb that includes an unexpectedly low first excited state at 282 keV. A ground state β branch of 33.2% was measured by following the growth and decay of the 135Sb daughter. Shell-model calculations are consistent with the observed 135Sb level structure and can account for a lowered first excited state.
Bickley Abigail
Brown Alex B.
Fedorov D.
Fedoseyev V.
Fynbo H. O.
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