Experimental search for the singlet metastable deuteron in the radiative n-p capture

Борзаков, С. Б.; Gundorin, N. A.; Pokotilovski, Yu. N.

doi:10.1134/s154747711504010x

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…Preliminary experiments performed at the Dubna pulse reactor IBR-2 are described in Refs. [19,20]. It was decided to carry out a new measurement using higher neutron flux and with desirably lower background.…”

Section: Methodsmentioning

confidence: 99%

Experimental search for the bound state singlet deuteron in the radiative n-p capture

Belgya,

Borzakov,

Jentschel

et al. 2018

Preprint

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We performed an experimental search for the bound state singlet deuteron predicted in some microscopic calculations. The predicted energy of this metastable level is in vicinity of the deuteron disintegration threshold. This state should manifest itself in two-photon transition following thermal neutron capture by protons. The experiment consists in the search for the second gamma-ray in the cascade through a high statistics measurement of γ-ray spectra after cold neutron capture by hydrogen nuclei. The upper limit 2µb (2σ level) is obtained for the cross section of the singlet deuteron production with the bound energy in the range 10-125 keV.

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Section: Methodsmentioning

confidence: 99%

Experimental search for the bound state singlet deuteron in the radiative n-p capture

Belgya,

Borzakov,

Jentschel

et al. 2018

Preprint

Self Cite

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show abstract

“…The latter is usually expected to be a resonance above the p − n break-up threshold, with an energy that is not firmly known. However, a bound state description of it at −67 keV has been contemplated [8], and we use this energy herein. We assume the coupling between the two states of different isospin to be negligible, and so the channels formed with the 1 S 0 state are not coupled to those formed with the 3 S 1 state.…”

Section: Introductionmentioning

confidence: 99%

6Li Structure Information from2 H (α,α) 2 H Scattering

Fraser¹,

Massen-Hane²,

Kadyrov³

et al. 2017

Proceedings of the 26th International Nuclear Physics Conference — PoS(INPC2016)

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In this study, we investigate low-energy elastic scattering of 4 He+ 2 H using an effective twobody clusterisation model. We solve the Lippmann-Schwinger equations assuming that coupling effects between channels involving the 2 H bound 3 S 1 state and those of the virtual 1 S 0 state are negligible. Two calculations have been performed; one using a potential that best recreates the 6 Li spectrum, and the other to best recreate the low-energy elastic cross section, for which there is a large amount of experimental data. The potential so prescribed in each case is used for both the 3 S 1 and 1 S 0 channel sets. These calculations show that an effective two-body model suffices to explain many features of the data.

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Role of scalar dibaryon andf0(500)in the isovector channel of low-energy neutron-proton scattering

et al. 2016

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We calculate the total and the differential cross section for np scattering at low energies in the isospin I = 1 channel within the so-called extended Linear Sigma Model. This model contains conventional (pseudo)scalar and (axial-)vector mesons, as well as the nucleon and its chiral partner within the mirror assignment. In order to obtain good agreement with experimental data analysis results we need to consider two additional resonances: the lightest scalar state f0(500) and a dibaryon state with quantum numbers I = 1, J P = 0 + (a.k.a. 1 S0 resonance). The resonance f0(500) is coupled to nucleons in a chirally invariant way through the mirror assignment and is crucial for a qualitatively correct description of the shape of the differential cross section. On the other hand, the dibaryon is exchanged in the s-channel and is responsible of the large cross section close to threshold. We compare our results to data analysis results performed by the SAID program of the CNS Data Analysis Center (in the following "SAID results").

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Experimental search for the singlet metastable deuteron in the radiative n-p capture

Cited by 4 publications

References 26 publications

Experimental search for the bound state singlet deuteron in the radiative n-p capture

Experimental search for the bound state singlet deuteron in the radiative n-p capture

6Li Structure Information from2 H (α,α) 2 H Scattering

Role of scalar dibaryon andf0(500)in the isovector channel of low-energy neutron-proton scattering

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