Kinematical separation of $\mth{\alpha}$-n final-state interaction at 50 MeV incident energy

S. Dey (Mandal); S.S. Dasgupta; C.C. Dey; P. Bhattacharya

doi:doi:10.1140/epja/i2002-10087-7

EPJ

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2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A 16, 193-197 (2003)
DOI: 10.1140/epja/i2002-10087-7

Kinematical separation of $\mth{\alpha}$ -n final-state interaction at 50 MeV incident energy

S. Dey (Mandal)¹, S.S. Dasgupta¹, C.C. Dey² and P. Bhattacharya²

¹ Department of Physics, The University of Burdwan, Burdwan - 713104, India
² Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata - 700064, India

dey_s2001@yahoo.com

(Received: 17 June 2002 / Revised version: 27 September 2002 / Published online: 4 February 2003)

Abstract
A kinematically complete experiment has been performed to study the $\alpha$ -n final-state interaction (FSI) in the $\alpha$ + d $\to \alpha$ + p + n break-up reaction at 50 MeV incident energy for the alpha-particles. For this, we have chosen four pairs of correlation angles for the outgoing alpha and protons. These are ( $\theta_{\alpha} = 18^\circ$ , $\theta_{\rm p}= 42^\circ$ ), ( $\theta_{\alpha} = 20^\circ$ , $\theta_{\rm p}= 45^\circ$ ), ( $\theta_{\alpha} = 22^\circ$ , $\theta_{\rm p}= 42^\circ$ ) and ( $\theta_{\alpha} = 22^\circ$ , $\theta_{\rm p}= 47^\circ$ ), selected kinematically where the allowed phase spaces are in favor of the $\alpha$ -n final-state interaction. Our experimental data show strong $\alpha$ -n FSI in all the selected configurations. Also, the FSI is found to be stronger at the lower alpha-particle energy when two FSI peaks appear in the same configuration.

PACS
25.55.-e - $\chem{^{3}H}$ -, $\chem{^{3}He}$ -, and $\chem{^{4}He}$ -induced reactions.
25.10.+s - Nuclear reactions involving few-nucleon systems.

© Società Italiana di Fisica, Springer-Verlag 2003