The (d,{sup 2}He) reaction on {sup 76}Se and the double-{beta}-decay matrix elements for A=76

Journal Article · Wed Oct 15 00:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.044301· OSTI ID:21192280

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; Simon, H ^[3]; Popescu, L ^[4]; Savran, D ^[2]; Zilges, A ^[5]

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1. Institut fuer Kernphysik, Westfaelische Wilhelms-Universitaet, D-48149 Muenster (Germany)
2. Kernfysisch Versneller Instituut, University of Groningen, NL-9747 AA Groningen (Netherlands)
3. Gesellschaft fuer Schwerionenforschung, D-63291 Darmstadt (Germany)
4. Vakgroep Subatomaire en Stralingsfysica, Universiteit Gent, B-9000 Gent (Belgium)
5. Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany)

The (d,{sup 2}He) charge-exchange reaction on {sup 76}Se was studied at an incident energy of 183 MeV. The outgoing two protons in the {sup 1}S{sub 0} state, referred to as {sup 2}He, were both momentum analyzed and detected by the same spectrometer and detector. The experiment was performed at KVI, Groningen, using the magnetic spectrometer BBS at three angular positions: 0 deg., 2.5 deg., and 5 deg. Excitation-energy spectra of the residual nucleus {sup 76}As were obtained with an energy resolution of about 120 keV (FWHM). Gamow-Teller (GT{sup +}) transition strengths were extracted up to 5 MeV and compared with those from an (n,p) experiment at low resolution. Together with the GT{sup -} transition strengths from the {sup 76}Ge(p,n) experiment leading to the same intermediate nucleus, the nuclear matrix element of the two-neutrino double-{beta} decay of {sup 76}Ge was evaluated.

• OSTI ID: 21192280
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 78, Issue 4; Other Information: DOI: 10.1103/PhysRevC.78.044301; (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
ARSENIC 76
CHARGE-EXCHANGE REACTIONS
DOUBLE BETA DECAY
ENERGY RESOLUTION
ENERGY SPECTRA
EXCITATION
GAMOW-TELLER RULES
GERMANIUM 76
HELIUM 2
KEV RANGE 100-1000
KVI
MAGNETIC SPECTROMETERS
MATRIX ELEMENTS
MEV RANGE 100-1000
NEUTRINOS
NUCLEAR MATRIX
NUCLEAR REACTIONS
PROTONS
SELENIUM 76