Re-evaluation of neutron-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>elastic scattering data near 20 MeV

Drosg, M.; Ortiz, R. Avalos; Hoop, B.

doi:10.1103/physrevc.83.064616

Cited by 4 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where E n are the threshold energies, there are 2 N possible combinations of the signs in front of the N square roots (12). Therefore for each value of the energy the Jost matrix has 2 N different values.…”

Section: Analytic Propertiesmentioning

confidence: 99%

“…Apparently, the sign of Im k n is determined by the choice of the sign in Eq. (12). The points sitting on a vertical line passing through all the sheets, correspond to the same energy but to different choices of the signs in Eqs.…”

Section: Analytic Propertiesmentioning

confidence: 99%

“…The points sitting on a vertical line passing through all the sheets, correspond to the same energy but to different choices of the signs in Eqs. (12).…”

Section: Analytic Propertiesmentioning

confidence: 99%

“…This system plays an important role in nuclear astrophysics as well as in the man-made thermonuclear fusion (for both the peaceful and military purposes). This is why so many publications have been devoted to experimental and theoretical studies of its properties (see, for example, few selected papers [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]). One of the controversial issues in these studies, that still remains vague, is the nature of the resonant state with J π = 3 2 + lying at around ∼ 50 keV above the dt-threshold.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Jost-matrix analysis of the resonance 5He*(3/2+) near the dt-threshold

Rakityansky,

Ershov

2018

Preprint

View full text Add to dashboard Cite

Experimental data on the nα and dt collisions in the quantum state J π = 3 2 + near the dt-threshold are fitted using the semi-analytic multi-channel Jost matrix with proper analytic structure and some adjustable parameters. Then the spectral points are sought as zeros of the Jost matrix determinant (which correspond to the S-matrix poles) at complex energies. The correct analytic structure makes it possible to calculate the fitted Jost matrix on any sheet of the Riemann surface whose topology involves not only the square-root but also the logarithmic branching caused by the Coulomb interaction. Within a distance of 100 keV above the dt-threshold, three 3 2 + -resonances are found on the non-physical sheet of the Riemann surface. Several S-matrix (shadow) poles on the other sheets of this surface are located as well.

show abstract

Section: Analytic Propertiesmentioning

confidence: 99%

Section: Analytic Propertiesmentioning

confidence: 99%

“…The points sitting on a vertical line passing through all the sheets, correspond to the same energy but to different choices of the signs in Eqs. (12).…”

Section: Analytic Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Jost-matrix analysis of the resonance 5He*(3/2+) near the dt-threshold

Rakityansky,

Ershov

2018

Preprint

View full text Add to dashboard Cite

show abstract

“…These distributions are called "double differential cross section (DDX) data". The DDX of light charged particle emission have been investigated by several researches both experimentally [8][9][10][11][12][13][14][15][16] and theoretically [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Double differential light charged particle emission cross sections for some structural fusion materials

Sarpün

Tel

2017

EPJ Web Conf.

View full text Add to dashboard Cite

Abstract. In fusion reactors, neutron induced radioactivity strongly depends on the irradiated material. So, a proper selection of structural materials will have been limited the radioactive inventory in a fusion reactor. First-wall and blanket components have high radioactivity concentration due to being the most fluxexposed structures. The main objective of fusion structural material research is the development and selection of materials for reactor components with good thermo-mechanical and physical properties, coupled with low-activation characteristics. Double differential light charged particle emission cross section, which is a fundamental data to determine nuclear heating and material damages in structural fusion material research, for some elements target nuclei have been calculated by the TALYS 1.8 nuclear reaction code at 14-15 MeV neutron incident energy and compared with available experimental data in EXFOR library. Direct, compound and pre-equilibrium reaction contribution have been theoretically calculated and dominant contribution have been determined for each emission of proton, deuteron and alpha particle.

show abstract

Jost-matrix analysis of the resonance 5He∗(3 2+) near the dt-threshold

Rakityansky

Ershov

2019

Int. J. Mod. Phys. E

View full text Add to dashboard Cite

Partial cross-sections of the [Formula: see text] and [Formula: see text] collisions in the quantum state [Formula: see text] near the [Formula: see text]-threshold, taken from an available [Formula: see text]-matrix analysis, are fitted using the semi-analytic multi-channel Jost matrix with proper analytic structure and some adjustable parameters. Then the spectral points are sought as zeros of the Jost matrix determinant (which correspond to the [Formula: see text]-matrix poles) at complex energies. The correct analytic structure makes it possible to calculate (analytically continue) the fitted Jost matrix on any sheet of the Riemann surface whose topology involves not only the square-root but also the logarithmic branching caused by the Coulomb interaction. As a result of such an analytic continuation, it was found that the previously established [Formula: see text]-resonance (at [Formula: see text]) and its shadow pole (at [Formula: see text]) both are split in overlapping pairs. Apart from studying the properties of a specific nuclear state, it is also proved for a general multi-channel problem that the Coulomb forces change the topology of the Riemann surface as well as destroy the so-called mirror symmetry of the [Formula: see text]-matrix.

show abstract

Re-evaluation of neutron-He4elastic scattering data near 20 MeV

Cited by 4 publications

References 18 publications

Jost-matrix analysis of the resonance 5He*(3/2+) near the dt-threshold

Jost-matrix analysis of the resonance 5He*(3/2+) near the dt-threshold

Double differential light charged particle emission cross sections for some structural fusion materials

Jost-matrix analysis of the resonance 5He∗(3 2+) near the dt-threshold

Contact Info

Product

Resources

About