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beta-decay studies ...
beta-decay studies of Sn135-137 using selective resonance laser ionization techniques
- Article/chapterEnglish2002
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LIBRIS-ID:oai:research.chalmers.se:5e23b26e-b5d1-41af-878f-248ef68159ec
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https://research.chalmers.se/publication/11160URI
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Language:English
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Summary in:English
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The decays of the very neutron rich Sn isotopes Sn135-137 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, gamma-ray singles, and gamma-gamma coincidence data were collected as a function of time. The half-life (T-1/2) and delayed neutron emission probability (P-n) values of 135 Sn were measured to be 530(20) ms and 21(3)%, respectively. For Sn-136, a T-1/2 of 250(30) ms was determined along with a P-n value of 30(5)%. For Sn-137, a T-1/2 of 190(60) ms and a P-n value of 58(15)% were deduced. Identification of low-energy transitions in Sb-135 was made possible by comparison of laser-on and laser-off gamma-ray spectra. Those data combined with gamma-gamma coincidence spectra were used to construct a level scheme for Sb-135 that includes an unexpectedly low first excited state at 282 keV. A ground state beta branch of 33.2% was measured by following the growth and decay of the Sb-135 daughter. Shell-model calculations are consistent with the observed Sb-135 level structure and can account for a lowered first excited state.
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Brown, B. A.
(author)
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Fedoseyev, V.
(author)
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Koster, U.
(author)
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Kratz, K. L.
(author)
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Sweryniak, D.
(author)
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Walters, W. B.
(author)
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Wohr, A.
(author)
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Fedorov, D.
(author)
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Hannawald, M.
(author)
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Hjorth-Jensen, M.
(author)
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Mishin, V.
(author)
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Pfeiffer, B.
(author)
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Ressler, J. J.
(author)
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Fynbo, H. O. U.
(author)
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Hoff, P.
(author)
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Mach, H.
(author)
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Nilsson, Thomas,1965
(author)
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Wilhelmsen Rolander, Katarina,1962
(author)
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Simon, H.
(author)
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Bickley, A.
(author)
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In:Physical Review C - Nuclear Physics65:32469-99852469-9993
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Shergur, J.
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Brown, B. A.
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Fedoseyev, V.
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Koster, U.
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Kratz, K. L.
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Sweryniak, D.
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show more...
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Walters, W. B.
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Wohr, A.
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Fedorov, D.
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Hannawald, M.
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Hjorth-Jensen, M ...
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Mishin, V.
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Pfeiffer, B.
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Ressler, J. J.
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Fynbo, H. O. U.
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Hoff, P.
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Mach, H.
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Nilsson, Thomas, ...
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Wilhelmsen Rolan ...
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Simon, H.
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Bickley, A.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Chalmers University of Technology