Lifetimes of the 6$sub 1$$sup +$ states in $sup 42$Ti and $sup 46$Ca and E2 effective charges in (1f$sub 7$$/$$sub 2$)/sup plus-or-minus//sup 2/ nuclei

Journal Article · Mon Sep 01 04:00:00 EDT 1975 · Phys. Rev., C, v. 12, no. 3, pp. 813-820

OSTI ID:4145844

Kutschera, W; Brown, B A; Ikezoe, H; Sprouse, G D; Yamazaki, Y; Yoshida, Y; Nomura, T; Ohnuma, H

The mean lifetimes of the 6$sup +$$sub 1$ states in $sup 42$Ti at 3041 keV and $sup 46$Ca at 2974 keV have been measured with the pulsed beam method to be tau = 5 plus-or-minus 2 ns and 15.2 plus-or-minus 0.8 ns, respectively. The states were populated via the reactions $sup 40$Ca($sup 3$He,n)$sup 42$Ti at E$sub 3$He=12 MeV and $sup 48$Ca($alpha$$,$$alpha$2n)$sup 46$Ca at E/sub alpha/=50 MeV. The deduced B (E2, 6$sup +$$Yields$$4$$sup +$) values result in proton and neutron effective charges which are in good agreement with other (1f$sub 7$$/$$sub 2$)/sup plus-or-minus//sup 2/ nuclei. However, the present lifetime result for $sup 42$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$sup +$$Yields$$4$$sup +$$Yields$$2$$sup +$$Yields$$0$$sup +$ transitions in (1f$sub 7$$/$$sub 2$)/sup plus-or-minus//sup 2/ nuclei is presented.

• Research Organization: Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo, Japan and Cyclotron Laboratory, The Institute of Physical and Chemical Research, Wako-shi, Saitama-ken, Japan
• NSA Number: NSA-33-004380
• OSTI ID: 4145844
• Journal Information: Phys. Rev., C, v. 12, no. 3, pp. 813-820, Journal Name: Phys. Rev., C, v. 12, no. 3, pp. 813-820; ISSN PRVCA
• Country of Publication: United States
• Language: English

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ALPHA REACTIONS-- CALCIUM 46-- CALCIUM 48-- KNOCK-OUT REACTIONS-- MEV RANGE 10- 100-- NEUTRONS
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CALCIUM 46-- EFFECTIVE CHARGE-- ENERGY LEVELS-- ENERGY-LEVEL TRANSITIONS-- LIFETIME
N68531* --Physics (Nuclear
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39 <= A <= 58--Energy Levels & Transitions
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SHELL MODELS EFFECTIVE CHARGE-- ENERGY LEVELS-- ENERGY-LEVEL TRANSITIONS-- LIFETIME-- TITANIUM 42