Unstable states in dissociation of relativistic nuclei

Artemenkov, D. A.; Bradnová, V.; Chernyavsky, M. M.; Firu, Elena; Kornegrutsa, N. K.; Malakhov, A.; Mitsova, E.; Neagu, Alina Tania; Peresadko, N. G.; Rusakova, V. V.; Stanoeva, R.; Zaitsev, A.; Zarubin, P. I.; Zarubina, I. G.

doi:10.1140/epja/s10050-020-00252-3

Cited by 17 publications

(51 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[26], such α-clustered nuclei can be created in heavy-ion reactions at intermediate energies. They can also be formed in the spectator regions of nuclei in relativistic heavy-ion collisions [27]. The separation of α-clustered and nucleonic states of nuclear matter can be explained [9] by the existence of the potential barrier between these two phases.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bose-Einstein condensation in finite drops of alpha particles

Satarov,

Mishustin,

Stoecker

2021

Preprint

View full text Add to dashboard Cite

Ground-state properties of finite drops of α particles (Q-balls) are studied within a fieldtheoretical approach in the mean-field approximation. The strong interaction of α's is described by the scalar field with a sextic Skyrme-like potential. The radial profiles of scalar-and Coulomb fields are found by solving the coupled system of Klein-Gordon and Poisson equations. A generalized condition for Bose-Einstein condensation in a finite system of charged bosons is formulated in terms of particle effective mass. The formation of shell-like nuclei, with vanishing density around the centre, is predicted at high enough attractive strength of Skyrme potential. The equilibrium values of energy and baryon number of Q-balls and Q-shells are calculated for different sets of interaction parameters. Empirical binding energies of α-conjugate nuclei are reproduced only if the gradient term in the Lagrangian is strongly enhanced. It is demonstrated that this enhancement can be explained by nonzero range of strong αα interaction.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Note that the parameters b = 30.73 MeV −2 and a = 3 • 10 4 used in Ref [15]. violate the constraint(27), which results in an unrealistically large binding energy of α matter W B 214 MeV.…”

mentioning

confidence: 99%

Bose-Einstein condensation in finite drops of alpha particles

Satarov,

Mishustin,

Stoecker

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Decays of unstable nuclei 8 Be → 2α and 9 B → 2αp, as well as the Hoyle state HS → 3α [1][2][3], can be reconstructed in the events of relativistic nuclei fragmentation in the nuclear track emulsion (NTE). Having extremely low decay energy, the above fragments appear as pairs and triplets with the smallest opening angles.…”

Section: Introductionmentioning

confidence: 99%

Enhanced production of $^{8}$Be nuclei in relativistic nuclei fragmentation

Peresadko,

Zaitsev,

Zarubin

2021

Preprint

Self Cite

View full text Add to dashboard Cite

This article is dedicated to the results of early measuring fragmentation of relativistic 16 O, 22 Ne, 28 Si, and 197 Au nuclei in a nuclear track emulsion. It has been found that there is a contribution of the unstable 8 Be nucleus decays to α-particle multiplicities. These renewed measurements of nuclear track emulsion exposed to 84 Kr nuclei at the energy of 950 MeV per nucleon have been analyzed and given below.

show abstract

“…The analysis of fragmentation of relativistic nuclei in a nuclear track emulsion (NTE) makes it possible to study internally non-relativistic ensembles of H and He nuclei starting with produced in decays of the unstable 8 Be and 9 B nuclei and up to the most complex ones [1][2][3]. NTE layers with a thickness of 200 to 500 µm, longitudinally exposed to the nuclei under study, make it possible to determine with full completeness and resolution of 0.5 µm the angles between the directions of emission of relativistic fragments in the cone sinθ f r = P f r /P 0 , where P f r = 0.2 GeV/c is the characteristic Fermi momentum of nucleons in a projectile nucleus with a momentum per nucleon.…”

Section: Introductionmentioning

confidence: 99%

“…To calculate the invariant masses of 2α-pairs Q 2α and 3α-triplets Q 3α in the approximation of conservation of momentum per nucleon by α-particles of the primary nucleus, only measurements of their emission angles are used. The correspondence between He - 4 He and H -1 H is assumed, since in the case of extremely narrow decays of 8 Be and 9 B, the measured contributions of 3 He and 2 H are small. The initial portions of the event distributions over the variables Q 2α and Q 3α contain peaks corresponding to 8 Be and HS for both 12 C and 16 O.…”

Section: Introductionmentioning

confidence: 99%

Correlation in formation of $^{8}$Be nuclei and $α$-particles in fragmentation of relativistic nuclei

Zaitsev,

Artemenkov,

Glagolev

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

In the events of peripheral dissociation of relativistic nuclei in the nuclear track emulsion, it is possible to study the emerging ensembles of He and H nuclei, including those from decays of the unstable 8 Be and 9 B nuclei, as well as the Hoyle state. These extremely short-lived states are identified by invariant masses calculated from the opening angles in 2α-pairs, 2αp-and 3αtriplets in the approximation of conservation of momentum per nucleon of the primary nucleus.In the same approach, it is possible to search for more complex states. This paper explores the correlation between the formation of 8 Be nuclei and the multiplicity of accompanying α-particles in the dissociation of relativistic 16 O, 22 Ne, 28 Si, and 197 Au nuclei. On this basis, estimates of such a correlation are presented for the unstable 9 B nucleus and the Hoyle state. An enhancement in the 8 Be contribution to dissociation with the α-particle multiplicity is found. Decays of 9 B nuclei and Hoyle states follow the same trend.

show abstract

Unstable states in dissociation of relativistic nuclei

Cited by 17 publications

References 38 publications

Bose-Einstein condensation in finite drops of alpha particles

Bose-Einstein condensation in finite drops of alpha particles

Enhanced production of $^{8}$Be nuclei in relativistic nuclei fragmentation

Correlation in formation of $^{8}$Be nuclei and $α$-particles in fragmentation of relativistic nuclei

Contact Info

Product

Resources

About