Studies on the double-{beta} decay nucleus {sup 64}Zn using the (d,{sup 2}He) reaction

Journal Article · Sun Jun 15 00:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.064303· OSTI ID:21191931

Grewe, E -W; Baeumer, C; Dohmann, H; Frekers, D; Hollstein, S; Rakers, S; Thies, J H ^[1]; Harakeh, M N; Berg, A M. van den; Woertche, H J ^[2]; Johansson, H; Martinez-Pinedo, G; Petermann, I; Sieja, K; Simon, H ^[3]; Langanke, K ^[3]; Nowacki, F ^[4]; Popescu, L ^[5]; Savran, D ^[2]; Zilges, A ^[6]

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1. Institut fuer Kernphysik, Westfaelische Wilhelms-Universitaet Muenster (Germany)
2. Kernfysisch Versneller Instituut, University of Groningen, NL-9747 AA Groningen (Netherlands)
3. Gesellschaft fuer Schwerionenforschung, D-64291 Darmstadt (Germany)
4. Institut de Recherches Subatomiques, Universite Louis Pasteur, F-67037 Strasbourg (France)
5. Vakgroep Subatomaire en Stralingsfysica, Universiteit Gent, B-9000 Gent (Belgium)
6. Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany)

The (d,{sup 2}He) charge-exchange reaction on the double-{beta} decay ({beta}{beta}) nucleus {sup 64}Zn has been studied at an incident energy of 183 MeV. The two protons in the {sup 1}S{sub 0} state (indicated as {sup 2}He) were both momentum analyzed and detected simultaneously by the BBS magnetic spectrometer and its position-sensitive detector. {sup 2}He spectra with a resolution of about 115 keV (FWHM) have been obtained allowing identification of many levels in the residual nucleus {sup 64}Cu with high precision. {sup 64}Zn is one of the rare cases undergoing a {beta}{beta} decay in {beta}{sup +} direction. In the experiment presented here, Gamow-Teller (GT{sup +}) transition strengths have been extracted. Together with the GT{sup -} transition strengths from {sup 64}Ni({sup 3}He,t) data to the same intermediate nucleus {sup 64}Cu, the nuclear matrix elements of the {beta}{beta} decay of {sup 64}Zn have been evaluated. Finally, the GT{sup {+-}} distributions are compared with shell-model calculations and a critical assessment is given of the various residual interactions presently employed for the pf shell.

• OSTI ID: 21191931
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 77, Issue 6; Other Information: DOI: 10.1103/PhysRevC.77.064303; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
CHARGE EXCHANGE
CHARGE-EXCHANGE REACTIONS
COPPER 64
DEUTERONS
DISTRIBUTION
DOUBLE BETA DECAY
GAMOW-TELLER RULES
HELIUM 2
HELIUM 3
KEV RANGE 100-1000
MAGNETIC SPECTROMETERS
MEV RANGE 100-1000
NICKEL 64
NUCLEAR MATRIX
POSITION SENSITIVE DETECTORS
PROTONS
RESIDUAL INTERACTIONS
RESOLUTION
SHELL MODELS
SPECTRA
ZINC 64 TARGET