Chapter 15
Studies on Hypernuclei and
Superheavy Elements
K. P. Santhosh
Abstract The properties of various hypernuclei including the binding and separation energies, decay properties, etc. are studied. An extended Bethe–Weizsäcker mass
formula (BWMF) has been proposed for finding the binding energies of hypernuclei. A new formula is also proposed for evaluating the hypernuclear separation
energies. These two new formalisms show better agreement with the experimental
results as compared to the other methods. The hypernuclear decay triggered by strong
interaction has been studied next. The isotopes of hyper Po, hyper Ra, and hyper Ac
are selected for the study. The alpha and cluster emissions from the hypernuclei are
studied by including a -nucleus potential to the well-known Coulomb and proximity potential proposed by Santhosh et al. Using the Modified Generalized Liquid
Drop Model and Phenomenological Model for Production cross section, we have
studied the alpha decay properties and fusion ER cross section for the SHE with Z
= 121. As the nuclei
302−304,306 121 shows three alpha chains, they could be synthesized and detected in a laboratory. We have studied the ER cross section for the
reaction,
50 Ti+
252 Es →
302 121,
54 Cr+
249 Bk →
303 121,
50 Ti+
254 Es →
304 121 and
48 Ca+
258 Md →
306 121 and found that
50 Ti+
252 Es →
302 121 is the most probable
reaction to synthesize SHE with Z = 121. We hope that our studies will be a guide
line for further investigations in these fields.
15.1 Introduction
Hypernuclei are many body systems consisting of ordinary nucleons and one or more
strange hyperons. Recently a large number of hypernuclei are produced experimentally and the studies on hypernuclei have received a lot of attention. Hyperons are
strange baryons. One of the characteristic features of the hyperon is that it is free
from Pauli’s exclusion principle, which makes it easy to deeply penetrate into the
nuclear interior.
K. P. Santhosh (B)
School of Pure and Applied Physics, Kannur University, Payyanur 670327, Kerala, India
e-mail: drkpsanthosh@gmail.com
© Springer Nature Singapore Pte Ltd. 2021
R. K. Puri et al. (eds.), Advances in Nuclear Physics, Springer Proceedings
in Physics 257, https://doi.org/10.1007/978-981-15-9062-7_15
203
Studies on Hypernuclei and
Superheavy Elements
K. P. Santhosh
Abstract The properties of various hypernuclei including the binding and separation energies, decay properties, etc. are studied. An extended Bethe–Weizsäcker mass
formula (BWMF) has been proposed for finding the binding energies of hypernuclei. A new formula is also proposed for evaluating the hypernuclear separation
energies. These two new formalisms show better agreement with the experimental
results as compared to the other methods. The hypernuclear decay triggered by strong
interaction has been studied next. The isotopes of hyper Po, hyper Ra, and hyper Ac
are selected for the study. The alpha and cluster emissions from the hypernuclei are
studied by including a -nucleus potential to the well-known Coulomb and proximity potential proposed by Santhosh et al. Using the Modified Generalized Liquid
Drop Model and Phenomenological Model for Production cross section, we have
studied the alpha decay properties and fusion ER cross section for the SHE with Z
= 121. As the nuclei
302−304,306 121 shows three alpha chains, they could be synthesized and detected in a laboratory. We have studied the ER cross section for the
reaction,
50 Ti+
252 Es →
302 121,
54 Cr+
249 Bk →
303 121,
50 Ti+
254 Es →
304 121 and
48 Ca+
258 Md →
306 121 and found that
50 Ti+
252 Es →
302 121 is the most probable
reaction to synthesize SHE with Z = 121. We hope that our studies will be a guide
line for further investigations in these fields.
15.1 Introduction
Hypernuclei are many body systems consisting of ordinary nucleons and one or more
strange hyperons. Recently a large number of hypernuclei are produced experimentally and the studies on hypernuclei have received a lot of attention. Hyperons are
strange baryons. One of the characteristic features of the hyperon is that it is free
from Pauli’s exclusion principle, which makes it easy to deeply penetrate into the
nuclear interior.
K. P. Santhosh (B)
School of Pure and Applied Physics, Kannur University, Payyanur 670327, Kerala, India
e-mail: drkpsanthosh@gmail.com
© Springer Nature Singapore Pte Ltd. 2021
R. K. Puri et al. (eds.), Advances in Nuclear Physics, Springer Proceedings
in Physics 257, https://doi.org/10.1007/978-981-15-9062-7_15
203