Mainz 2022 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 50: Structure and Dynamics of Nuclei VIII

HK 50.4: Vortrag

Mittwoch, 30. März 2022, 17:00–17:15, HK-H6

One-nucleon removal from ¹⁴O at 100 MeV/nucleon with a thin hydrogen target — •Thomas Pohl, Yelei Sun, Alexandre Obertelli, and SAMURAI 31 Collaboration — TU Darmstadt

Direct reactions at intermediate energies are an important tool for nuclear structure studies, but some reaction mechanisms are still not understood. One debated phenomenon is the asymmetric parallel momentum distribution (PMD) of the residual nucleus occuring occasional in one nucleon removal reactions[1-3]. Recent theoretical calculation of (p,pN) reactions with ¹⁴O at 100 MeV/nucleon with the distorted-wave impulse approximation (DWIA) predicted a large asymmetric PMD [4]. The low momentum tail is due to the attractive potential between the residues and the outgoing nucleons and the steep falloff on the high momentum side is due to the energy and momentum conservation. Still, comparison with experimental data is necessary for validation and will be a basis for further spectroscopic factor studies. We have performed ¹⁴O(p,pn)¹³O and ¹⁴O(p,2p)¹³N reactions at  100 MeV/nucleon with a thin solid hydrogen target at SAMURAI at RIKEN. Momentum of the residues were extracted from the SAMURAI spectrometer. Details of the data analysis and preliminary results of the cross section and PMD will be presented.

[1] A. Gade et al., Phys. Rev. C 71, 051301(R)(2005).
[2] K.L. Yurkewicz et al., Phys. Rev. C 74, 024304 (2006).
[3] F. Flavigny et al., Phys. Rev. Lett. 108, 252501 (2012).
[4] K. Ogata et al., J. Phys. Rev. C 92, 034616 (2015).