Properties of states in41Ca excited in the40Ca(α, 2pn)41Ca reaction

A b s t r a c t :A v a i l a b l e i n f o r m a t i o n p e r t a i n i n g t o t h e n u c l e a r s t r u c t u r e o f a l l n u c l e i w i t h m a s s n u m b e r s A = 4 1 ranging from Al (Z=13) to Ti (Z=22) are presented. The experimental reaction and decay data are evaluated and a n y i n c o n s i s t e n c i e s o r d i s c r e p a n c i e s a r e n o t e d . T h e a d o p t e d v a l u e s f o r v a r i o u s l e v e l p r o p e r t i e s ( s u c h a s t h e spin, parity and and halflife) and gamma properties (energy, intensity and multipole character) are given. Since the prior evaluation several new measurements have expanded our knowledge of A=41 nuclides. The half-life o f t h e g r o u n d s t a t e o f 4 1 S i h a s b e e n d e t e r m i n e d a n d a s i n g l e e x c i t e d s t a t e i d e n t i f i e d . E x c i t e d l e v e l s i n 4 1 P h a v e b e e n o b s e r v e d f o r t h e f i r s t t i m e . I n 4 1 C l , s e v e n n e w e x c i t e d s t a t e s h a v e b e e n i d e n t i f i e d i n d e e p inelastic and heavy ion transfer reactions. Half-lifes for four states in 4 1 Ar have been updated and additional levels with gammas have been included from a new measurement using the multiple ion transfer reaction. In 41 Ca v i a c h a r g e -e x c h a n g e r e a c t i o n m e a s u r e m e n t s , s e v e r a l n e w e x c i t e d s t a t e s w e r e o b s e r v e d . A n u m b e r o f n e w resonances in 41 K have been identified via the (p,γ ) reaction. T h e r e r e m a i n s a s i g n i f i c a n t d i s c r e p a n c y i n t h e h a l f -l i f e o f t h e f i r s t e x c i t e d s t a t e ( 9 8 0 k e V ) i n 4 1 K , w i t h measurements differing by more than an order of magnitude. Transfer reactions suggest that this M1 transition s h o u l d b e l -f o r b i d d e n , h o w e v e r , s e v e r a l m e a s u r e m e n t s y i e l d a l i f e t i m e w h i c h s u g g e s t s a s i z a b l e M 1 s t r e n g t h .Further measurements to resolve the current conflicts would be beneficial.General Policies and Organization of Material: see http://www.nndc.bnl.gov/nds/NDSPolicies.pdf. Acknowledgments:The use of the NSR database (2014Pr09) and data from the XUNDL database has greatly helped to o p t i m i z e t h e e v a l u a t i o n t i m e . T h e e v a l u a t o r s t h a n k J . K T u l i a n d M . J . M a r t i n f o r u s e f u l d i s c u s s i o n s a n d J .Totans (NNDC) and L. Saddiq (ORNL) for providing some of the reference material. The careful and thorough review from A.A. Sonzogni is also greatly appreciated.

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Lifetimes of the61+states inTi42<

Kutschera

Brown

Ikezoe

et al. 1975

Phys. Rev. C

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The mean lifetimes of the 6~+ states in "Ti at 3041 keV and ' Ca at 2974 keV have been measured with the pulsed beam method to be v = 5~2 ns and 15.2~0.8 ns, respectively. The states were populated via the reactions ' Ca('He, n)"Ti at E3~= 12 MeV and "Ca(a,a2n) Ca at E = 50 MeV. The deduced B(E2, 6+-i4+) values result in proton and neutron effective charges which are in good agreement with other (1f,/2) ' nuclei.However, the present lifetime result for "Ti is in disagreement with another measurement for this nucleus. A comparison of E2 effective charges extracted from all presently available B(E2) data on the 6+-i4+~2+ -4+ transitions in (1f,/2) ' nuclei is presented. NUCLEAR REACTIONSCa(SHe, ny), 8 =12 MeV, Ca(a, n2ny), E=50 MeV; measured pulsed beam electronic timing; deduced T~y2, B(E2), effective charges. Natural and enriched targets, Ge(Li) detectors.

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Properties of states in41Ca excited in the40Ca(α, 2pn)41Ca reaction

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Energy levels of A = 21–44 nuclei (VI)

Energy levels of A = 21–44 nuclei (VI)

Nuclear Data Sheets for A = 41

Lifetimes of the61+states inTi42<

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