Total photoabsorption cross sections for {sup 1}H, {sup 2}H, and {sup 3}He from 200 to 800 MeV

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.53.41· OSTI ID:277421

MacCormick, M; Audit, G; dHose, N; Ghedira, L; Isbert, V; Kerhoas, S; Murphy, L Y; Tamas, G; Wallace, P A ^[1]; Altieri, S; Braghieri, A; Pedroni, P; Pinelli, T ^[2]; Ahrens, J; Beck, R ^[3]; Annand, J R; Crawford, R A; Kellie, J D; MacGregor, I J ^[4]; Dolbilkin, B ; Zabrodin, A ^[5]

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1. Service de Physique Nucleaire - DAPNIA, Centre dEtudes de Saclay, 91191 Gif-sur-Yvette (France)
2. Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, via Bassi 6, 27100 Pavia (Italy)
3. Institut fuer Kernphysik, Universitaet Mainz, D-55099 Mainz (Germany)
4. Department Of Physics and Astronomy, University of Glasgow (United Kingdom)
5. Institute for Nuclear Research, 7a, Prospect 60 Let Oktyabrya, 117312, Moscow (Russia)

The total photoabsorption cross sections for {sup 1}H, {sup 2}H, and {sup 3}He have been measured for incident photon energies ranging from 200 to 800 MeV. The {sup 3}He data are the first for this nucleus. By using the large acceptance detector DAPHNE in conjunction with the tagged photon beam facility of the MAMI accelerator in Mainz, cross sections of high precision have been obtained. The results show clearly the changes in the nucleon resonances in going from {sup 1}H to {sup 3}He. In particular, for the {ital D}{sub 13} region the behavior for {sup 3}He is intermediate between that for {sup 1}H, {sup 2}H, and heavier nuclei. This will provide a strong constraint to the theories that are presently being developed with a view to explaining the apparent {open_quote}{open_quote}damping{close_quote}{close_quote} of higher resonances in heavy nuclei. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 277421
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 53; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ABSORPTION
CROSS SECTIONS
DEUTERIUM TARGET
HELIUM 3 TARGET
HYDROGEN 1 TARGET
MEV RANGE 100-1000
PHOTONUCLEAR REACTIONS
RESONANCE