Abstract
We present new data for angular distributions and on the cross section ratio of the p+d → 3He + η reaction at excess energies of Q = 48.8 MeV and Q = 59.8 MeV. The data have been obtained at the WASA-at-COSY experiment (Forschungszentrum Jülich) using a proton beam and a deuterium pellet target. While the shape of obtained angular distributions show only a slow variation with the energy, the new results indicate a distinct and unexpected total cross section fluctuation between Q = 20 MeV and Q = 60 MeV, which might indicate the variation of the production mechanism within this energy interval.
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References
T. Mersmann et al., Phys. Rev. Lett. 98, 242301 (2007).
J. Smyrski et al., Phys. Lett. B 649, 258 (2007).
J. Berger et al., Phys. Rev. Lett. 61, 919 (1988).
B. Mayer et al., Phys. Rev. C 53, 2068 (1996).
H.-H. Adam et al., Phys. Rev. C 75, 014004 (2007).
T. Rausmann et al., Phys. Rev. C 80, 017001 (2009).
R. Bilger et al., Phys. Rev. C 65, 044608 (2002).
R. Bilger et al., Phys. Rev. C 69, 014003 (2004).
M. Betigeri et al., Phys. Lett. B 472, 267 (2000).
N.G. Kelkar et al., Rep. Prog. Phys. 76, 066301 (2013).
H.-H. Adam, Proposal for the Wide Angle Shower Apparatus (WASA) at COSY-Jülich ``WASA at COSY'' (2004).
F. Bergmann, IKP Annual Report 2008, FZ-Jülich (2008) Jül-4282, p. 52.
A. Passfeld, Diploma thesis, Westfälische Wilhelms-Universität Münster, Germany (2010).
M. Bashkanov et al., Phys. Lett. B 637, 223 (2006).
P. Berthet et al., Nucl. Phys. A 443, 589 (1985).
C. Kerboul et al., Phys. Lett. B 181, 28 (1986).
R. Maier, Nucl. Instrum. Methods A 390, 1 (1997).
A. Khoukaz, 42nd Meeting of the COSY Programme Advisory Committee (PAC), Proposal 220 (2014).
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WASA-at-COSY Collaboration., Adlarson, P., Augustyniak, W. et al. Cross section ratio and angular distributions of the reaction p + d → 3He + η at 48.8 MeV and 59.8 MeV excess energy. Eur. Phys. J. A 50, 100 (2014). https://doi.org/10.1140/epja/i2014-14100-4
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DOI: https://doi.org/10.1140/epja/i2014-14100-4