Angular correlations in the prompt neutron emission of spontaneous fission of 252Cf

Chietera, A.; Stuttgé, L.; Gönnenwein, F.; Kopatch, Yu. N.; Mutterer, M.; Gagarski, A. M.; Guseva, I. S.; Чернышева, Е. А.; Hambsch, F.‐J.; Hanappe, F.; Mezentseva, Zh. V.; Telezhnikov, S.A.

doi:10.1140/epja/i2018-12529-y

Cited by 10 publications

(14 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The (n, n, F) data taken allow simultaneously analysing (n, F) correlations in the search of scission neutrons [16] provided the dynamical anisotropy is known otherwise, e.g. from the present type of experiments.…”

Section: Resultsmentioning

confidence: 99%

“…Angular momenta are aligned perpendicular A nF ). From theory the anisotropy A nF ≈ 0.08 is evaluated which for the normalized distribution yields b≈0.052 [10,16].…”

Section: Monte Carlo Simulationsmentioning

confidence: 99%

“…4 for different anisotropy parameters A n J . Theory suggests A nF ≈0.08 [10,16], which corresponds to A n J ≈ 0.16. Practically the same magnitude of anisotropy was concluded from experiment [3].…”

Section: Monte Carlo Simulationsmentioning

confidence: 99%

See 2 more Smart Citations

Angular correlations in the prompt neutron emission in spontaneous fission of²⁵²Cf

et al. 2017

View full text Add to dashboard Cite

Abstract. An experiment aiming at the detailed investigation of angular correlations in the neutron emission from spontaneous fission of 252 Cf has been performed at IPHC Strasbourg using the angle-sensitive double ionization chamber CODIS for measuring fission fragments and a set of 60 DEMON scintillator counters for neutron detection. The main aim of the experiment is to search for an anisotropy of neutron emission in the center-of-mass system of the fragments. The present status of the data analysis and the full Monte-Carlo simulation of the experiment are reported in the present paper.

show abstract

Section: Resultsmentioning

confidence: 99%

“…Angular momenta are aligned perpendicular A nF ). From theory the anisotropy A nF ≈ 0.08 is evaluated which for the normalized distribution yields b≈0.052 [10,16].…”

Section: Monte Carlo Simulationsmentioning

confidence: 99%

See 1 more Smart Citation

Angular correlations in the prompt neutron emission in spontaneous fission of²⁵²Cf

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Also prompt neutron emission has been measured, for a recent work see Ref. [25]. The fractional percentage of ternary fission "scission" neutrons has been determined to be 7.6 ± 2.8% [26,27].…”

Section: Experimental Datamentioning

confidence: 99%

Light element ($$Z=1,2$$) production from spontaneous ternary fission of $$^{252}$$Cf

2020

View full text Add to dashboard Cite

The yields of light elements ($$Z=1,2$$ Z = 1 , 2 ) obtained from spontaneous ternary fission of $$^{252}$$ 252 Cf are treated within a nonequilibrium approach, and the contribution of unstable nuclei and excited bound states is taken into account. These light cluster yields may be used to probe dense matter, and to infer in-medium corrections such as Pauli blocking which is determined by the nucleon density. Continuum correlations are calculated from scattering phase shifts using the Beth-Uhlenbeck formula, and the effect of medium modification is estimated. The relevant distribution is reconstructed from the measured yields of isotopes. This describes the state of the nucleon system at scission and cluster formation, using only three Lagrange parameters which are the nonequilibrium counterparts of the temperature and chemical potentials, as defined in thermodynamic equilibrium. We concluded that a simple nuclear statistical equilibrium model neglecting continuum correlations and medium effects is not able to describe the measured distribution of H and He isotopes. Moreover, the freeze-out concept may serve as an important ingredient to the nonequilibrium approach using the relevant statistical operator concept.

show abstract

“…We note that even if scission neutrons are emitted isotropically, they may not be detected as such in the lab frame. Scission neutrons make up an unknown fraction of the total neutron emission, estimated at approximately 10 − 20% [12,28,29].…”

Section: Anisotropy In Neutron Emission Ratementioning

confidence: 99%

High resolution measurement of tagged two-neutron energy and angle correlations in Cf252 (sf)

et al. 2019

View full text Add to dashboard Cite

Background: Spontaneous fission events emit prompt neutrons correlated with one another in emission angle and energy. Purpose: We explore the relationship in energy and angle between correlated prompt neutrons emitted from 252 Cf spontaneous fission. Methods: Measurements with the Chi-Nu array provide experimental data for coincident neutrons tagged with a fission chamber signal with 10 o angular resolution and 1 ns timing resolution for time-of-flight energy calculations. The experimental results are compared to simulations produced by the fission event generators CGMF, FREYA, and MCNPX-POLIMI IPOL(1)=1. Results: We find that the measurements and the simulations all exhibit anisotropic neutron emission, though differences exist between fission event generators. Conclusions: This work shows that the dependence of detected neutron energy on the energy of a neutron detected in coincidence, although weak, is non-negligible,indicating that there may be correlations in energy between two neutrons emitted in the same fission event.

show abstract

Angular correlations in the prompt neutron emission of spontaneous fission of 252Cf

Cited by 10 publications

References 18 publications

Angular correlations in the prompt neutron emission in spontaneous fission of²⁵²Cf

Angular correlations in the prompt neutron emission in spontaneous fission of²⁵²Cf

Light element ($$Z=1,2$$) production from spontaneous ternary fission of $$^{252}$$Cf

High resolution measurement of tagged two-neutron energy and angle correlations in Cf252 (sf)

Contact Info

Product

Resources

About

Angular correlations in the prompt neutron emission of spontaneous fission of 252Cf

Cited by 10 publications

References 18 publications

Angular correlations in the prompt neutron emission in spontaneous fission of252Cf

Angular correlations in the prompt neutron emission in spontaneous fission of252Cf

Light element ($$Z=1,2$$) production from spontaneous ternary fission of $$^{252}$$Cf

High resolution measurement of tagged two-neutron energy and angle correlations in Cf252 (sf)

Contact Info

Product

Resources

About

Angular correlations in the prompt neutron emission in spontaneous fission of²⁵²Cf

Angular correlations in the prompt neutron emission in spontaneous fission of²⁵²Cf