30 March 2004 RISING stopped beam physics workshop University of Brighto Microsecond isomers in A~110 nuclei •Few nuclei have oblate ground states (~86% are prolate in their ground state) Phys Rev C64 (2001) 037301. •Fewer have oblate shapes which compete at ‘high’ angular momentum. •Global shape calculations Nucl Phys A617 (1997) 282 suggest such states might exist in the neutron-rich A~110 nuclei but how to study them??
Microsecond isomers in A~110 nuclei. Few nuclei have oblate ground states (~86% are prolate in their ground state) Phys Rev C64 (2001) 037301 . Fewer have oblate shapes which compete at ‘high’ angular momentum. - PowerPoint PPT Presentation
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30 March 2004 RISING stopped beam physics workshop University of Brighton
Microsecond isomers in A~110 nuclei
•Few nuclei have oblate ground states (~86% are prolate in their ground state) Phys Rev C64 (2001) 037301.
•Fewer have oblate shapes which compete at ‘high’ angular momentum.
•Global shape calculations Nucl Phys A617 (1997) 282 suggest such states might exist in the neutron-rich A~110 nuclei but how to study them??
30 March 2004 RISING stopped beam physics workshop University of Brighton
Efficiency of FRS =10 % ~21 10-3 per day. 4,629 days for 100 counts!!
30 March 2004 RISING stopped beam physics workshop University of Brighton
Comparison with something which we know works!!
• Zsolt’s experiment on 190W ( estimated = 2500 nb) => need to find a factor of 2500/0.4 =6,250
• Assume FRS efficiency is constant• RISING gives an improvement of a factor of 10over the set-up used for Zsolt’s experiment.• Need a factor of 625 in beam intensity,i.e need 6.25 1010 particles per spill