English

What can we know about hypernuclei via analysis of bremsstrahlung photons?

Nuclear Theory 2018-10-30 v1 High Energy Physics - Phenomenology Nuclear Experiment

Abstract

We investigate possibility of emission of the bremsstrahlung photons in nuclear reactions with hypernuclei for the first time. A new model of the bremsstrahlung emission which accompanies interactions between α\alpha particles and hypernuclei is constructed, where a new formalism for the magnetic momenta of nucleons and hyperon inside hypernucleus is added. For first calculations, we choose α\alpha decay of the normal nucleus 210Po^{210}{\rm Po} and the hypernucleus Λ211Po^{211}_{\Lambda}{\rm Po}. We find that (1) emission for the hypernucleus Λ211Po^{211}_{\Lambda}{\rm Po} is larger than for normal nucleus 210Po^{210}{\rm Po}, (2) difference between these spectra is small. We propose a way how to find hypernuclei, where role of hyperon is the most essential in emission of bremsstrahlung photons during α\alpha decay. As demonstration of such a property, we show that the spectra for the hypernuclei Λ107Te^{107}_{\Lambda}{\rm Te} and Λ109Te^{109}_{\Lambda}{\rm Te} are essentially larger than the spectra for the normal nuclei 106Te^{106}{\rm Te} and 108Te^{108}{\rm Te}. Such a difference is explained by additional contribution of emission to the full bremsstrahlung, which is formed by magnetic moment of hyperon inside hypernucleus. The bremsstrahlung emission formed by such a mechanism, is of the magnetic type. A new formula for fast estimations of bremsstrahlung spectra for even-even hypernuclei is proposed, where role of magnetic moment of hyperon of hypernucleus in formation of the bremsstrahlung emission is shown explicitly. Such an analysis opens possibility of new experimental study of properties of hypernuclei via bremsstrahlung study.

Keywords

Cite

@article{arxiv.1810.11942,
  title  = {What can we know about hypernuclei via analysis of bremsstrahlung photons?},
  author = {Xin Liu and Sergei P. Maydanyuk and Peng-Ming Zhang and Ling Liu},
  journal= {arXiv preprint arXiv:1810.11942},
  year   = {2018}
}

Comments

25 pages, 2 captured figures