Theoretical study of the pressure effect on the electron-capture $\ensuremath{\beta}$ decay of ${}^{7}$Be in ${}^{7}$BeO and ${}^{7}$Be(OH)${}_{2}$

Theoretical study of the pressure effect on the electron-capture $β$ decay of $^{7}$ Be in $^{7}$ BeO and $^{7}$ Be(OH) $_{2}$

A. V. Bibikov, A. V. Avdeenkov, I. V. Bodrenko, A. V. Nikolaev, and E. V. Tkalya

Phys. Rev. C 88, 034608 – Published 23 September 2013

Abstract

Ab initio quantum mechanical methods based on the Hartree-Fock approach are used to study the probability of electron capture by the $^{7}$ Be nucleus in the $^{7}$ BeO crystal and the $β$ phase of the $^{7}$ Be(OH) $_{2}$ crystal modeled as clusters subjected to external pressure. Calculated rates of the increase of the $^{7}$ Be nuclear decay constant $λ$ with pressure in these compounds are substantially smaller than the values found experimentally. We discuss possible reasons for discrepancy between the theory and the experiment. In particular, we demonstrate that the increase of $λ$ in $^{7}$ BeO can be accounted for by the discussed phase transformation from the wurtzite to the rock-salt structure.

Received 9 June 2013

DOI:https://doi.org/10.1103/PhysRevC.88.034608

Authors & Affiliations

A. V. Bibikov¹, A. V. Avdeenkov^1,2,3, I. V. Bodrenko^1,4, A. V. Nikolaev^1,5, and E. V. Tkalya^1,6,*

¹Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Leninskie gory, Moscow, Russia
²SSC Institute of Physics and Power Engineering, Obninsk, Kaluga Region, Russia
³National Institute for Theoretical Physics, Stellenbosch Institute of Advanced Study, Matieland 7602, South Africa
⁴National Nanotechnology Laboratory (NNL), Istituto Nanoscienze-CNR, Via per Arnesano 16, Lecce, Italy
⁵Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow Region, Russia
⁶Nuclear Safety Institute of Russian Academy of Science, Bol'shaya Tulskaya 52, Moscow, Russia

^*tkalya@srd.sinp.msu.ru

Comments & Replies

Comment on “Theoretical study of the pressure effect on the electron-capture β decay of ${}^{7}{Be}$ in ${}^{7}{BeO}$ and ${}^{7}{Be}$ ${(OH)}_{2} ”$

A. Ray and P. Das

Phys. Rev. C 90, 019801 (2014)

Reply to “Comment on ‘Theoretical study of the pressure effect on the electron-capture $β$ decay of $^{7} Be$ in $^{7} BeO$ and ${^{7} Be (OH)}_{2} ’ ”$

A. V. Bibikov, A. V. Avdeenkov, I. V. Bodrenko, A. V. Nikolaev, and E. V. Tkalya

Phys. Rev. C 90, 019802 (2014)

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Vol. 88, Iss. 3 — September 2013

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Physical Review C

covering nuclear physics

Theoretical study of the pressure effect on the electron-capture $β$ decay of $^{7}$ Be in $^{7}$ BeO and $^{7}$ Be(OH) $_{2}$

A. V. Bibikov, A. V. Avdeenkov, I. V. Bodrenko, A. V. Nikolaev, and E. V. Tkalya

Phys. Rev. C 88, 034608 – Published 23 September 2013

Abstract

Authors & Affiliations

Comments & Replies

Comment on “Theoretical study of the pressure effect on the electron-capture β decay of ${}^{7}{Be}$ in ${}^{7}{BeO}$ and ${}^{7}{Be}$ ${(OH)}_{2} ”$

A. Ray and P. Das

Phys. Rev. C 90, 019801 (2014)

Reply to “Comment on ‘Theoretical study of the pressure effect on the electron-capture $β$ decay of $^{7} Be$ in $^{7} BeO$ and ${^{7} Be (OH)}_{2} ’ ”$

A. V. Bibikov, A. V. Avdeenkov, I. V. Bodrenko, A. V. Nikolaev, and E. V. Tkalya

Phys. Rev. C 90, 019802 (2014)

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Physical Review C

covering nuclear physics

Theoretical study of the pressure effect on the electron-capture β decay of 7Be in 7BeO and 7Be(OH)2

A. V. Bibikov, A. V. Avdeenkov, I. V. Bodrenko, A. V. Nikolaev, and E. V. Tkalya

Phys. Rev. C 88, 034608 – Published 23 September 2013

Abstract

Authors & Affiliations

Comments & Replies

Comment on “Theoretical study of the pressure effect on the electron-capture β decay of Be7 in BeO7 and Be7(OH)2”

A. Ray and P. Das

Phys. Rev. C 90, 019801 (2014)

Reply to “Comment on ‘Theoretical study of the pressure effect on the electron-capture β decay of 7Be in 7BeO and 7Be(OH)2’ ”

A. V. Bibikov, A. V. Avdeenkov, I. V. Bodrenko, A. V. Nikolaev, and E. V. Tkalya

Phys. Rev. C 90, 019802 (2014)

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Theoretical study of the pressure effect on the electron-capture $β$ decay of $^{7}$ Be in $^{7}$ BeO and $^{7}$ Be(OH) $_{2}$

Comment on “Theoretical study of the pressure effect on the electron-capture β decay of ${}^{7}{Be}$ in ${}^{7}{BeO}$ and ${}^{7}{Be}$ ${(OH)}_{2} ”$

Reply to “Comment on ‘Theoretical study of the pressure effect on the electron-capture $β$ decay of $^{7} Be$ in $^{7} BeO$ and ${^{7} Be (OH)}_{2} ’ ”$