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Correlations in intermediate-energy two-proton removal reactions

Wimmer, K, Bazin, D, Gade, A, Tostevin, JA, Baugher, T, Chajecki, Z, Coupland, D, Famiano, MA, Ghosh, TK, Grinyer, GF , Hodges, R, Howard, ME, Kilburn, M, Lynch, WG, Manning, B, Meierbachtol, K, Quarterman, P, Ratkiewicz, A, Sanetullaev, A, Simpson, EC, Stroberg, SR, Tsang, MB, Weisshaar, D, Winkelbauer, J, Winkler, R and Youngs, M (2012) Correlations in intermediate-energy two-proton removal reactions Physical Review Letters, 109 (20), 202505.

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We report final-state-exclusive measurements of the light charged fragments in coincidence with 26Ne residual nuclei following the direct two-proton removal from a neutron-rich 28Mg secondary beam. A Dalitz-plot analysis and comparisons with simulations show that a majority of the triple-coincidence events with two protons display phase-space correlations consistent with the (two-body) kinematics of a spatially correlated pair-removal mechanism. The fraction of such correlated events, 56(12)%, is consistent with the fraction of the calculated cross section, 64%, arising from spin S=0 two-proton configurations in the entrance-channel (shell-model) 28Mg ground state wave function. This result promises access to an additional and more specific probe of the spin and spatial correlations of valence nucleon pairs in exotic nuclei produced as fast secondary beams.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
Wimmer, K
Bazin, D
Gade, A
Tostevin, JA
Baugher, T
Chajecki, Z
Coupland, D
Famiano, MA
Ghosh, TK
Grinyer, GF
Hodges, R
Howard, ME
Kilburn, M
Lynch, WG
Manning, B
Meierbachtol, K
Quarterman, P
Ratkiewicz, A
Sanetullaev, A
Simpson, EC
Stroberg, SR
Tsang, MB
Weisshaar, D
Winkelbauer, J
Winkler, R
Youngs, M
Date : 16 November 2012
DOI : 10.1103/PhysRevLett.109.202505
Related URLs :
Additional Information : Copyright 2012 The American Physical Society.
Depositing User : Symplectic Elements
Date Deposited : 21 Dec 2012 12:32
Last Modified : 31 Oct 2017 14:56

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