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Title: Evidence for the dipole nature of the low-energy γ enhancement in Fe56

Here, the γ-ray strength function of 56Fe has been measured from proton-γ coincidences for excitation energies up to ≈11 MeV. The low-energy enhancement in the γ-ray strength function, which was first discovered in the (3He,αγ)56Fe reaction, is confirmed with the (p,p'γ)56Fe experiment reported here. Angular distributions of the γ rays give for the first time evidence that the enhancement is dominated by dipole transitions.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [1] ;  [1] ;  [1] ;  [1] ;  [3] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [4] ;  [1] ;  [5] ;  [6]
  1. Univ. of Oslo, Oslo (Norway)
  2. INFN, Milano (Italy)
  3. INFN, Milano (Italy); Univ. of Milano, Milano (Italy)
  4. Univ. of Oslo, Oslo (Norway); MTA ATOMKI, Debrecen (Hungary)
  5. Ohio Univ. Athens, OH (United States)
  6. iThemba LABS, Somerset West (South Africa)
Publication Date:
OSTI Identifier:
1256982
Grant/Contract Number:
NA0001837; FG02-88ER40387
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 24; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Ohio Univ. Athens, OH (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS Gamma strength function