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Simultaneous measurement of the ([gamma],[ital p])/([gamma],[ital n]) cross-section ratio in [sup 4]He as a test of charge symmetry

Journal Article · · Physical Review Letters; (United States)
; ; ; ; ;  [1]; ;  [2]
  1. Saskatchewan Accelerator Laboratory, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 0W0 (Canada)
  2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
+ Show Author Affiliations
We have measured ([gamma],[ital p]) and ([gamma],[ital n]) differential yields at 90[degree] for the two-body photodisintegration of [sup 4]He using tagged photons of energy [ital E][sub [gamma]]=25--60 MeV. Data for both channels were obtained simultaneously using windowless [Delta][ital E]-[ital E] telescopes to detect the [sup 3]He and [sup 3]H recoils. The ration of our angle-integrated yields, which is insensitive to systematic uncertainies due to the simultaneity of the measurements, agrees with calculations employing only charge-symmetric nuclear interactions. Thus, within the present errors, our data show no evidence of a significant charge-symmetry violation in [sup 4]He in this energy range.
DOE Contract Number:
W-7405-ENG-36
OSTI ID:
7116789
Journal Information:
Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:22; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English

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Related Subjects

663410* -- Photonuclear Reactions & Photon Scattering-- (1992-)
663510 -- Nuclear Mass Ranges-- A=1-5-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BASIC INTERACTIONS
CHARGES
CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
EVEN-EVEN NUCLEI
HELIUM 4
HELIUM ISOTOPES
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
NUCLEI
PARTICLE INTERACTIONS
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NEUTRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PHOTON-PROTON INTERACTIONS
STABLE ISOTOPES
SYMMETRY
TESTING