Neutron-neutron scattering length from the 2H(n, np)n reaction at bombarding energies up to 27 MeV

Witsch, W. von; Moreno, B.; Rosenstock, W.; Ettling, K.; Bruinsma, J.

doi:10.1016/0370-2693(79)90194-1

Cited by 13 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Attempts have been made in the past to determine a nn solely from the shape of the cross section using the Watson-Migdal model [12] or theoretical cross sections obtained with separable, S-wave NN potentials [10,11]. Here we applied a similar approach, but using instead rigorous Faddeev predictions of three modern NN potential models.…”

Section: B Determination From the Shape Of The Nn Fsi Cross Sectionmentioning

confidence: 99%

“…Further attempts to obtain more accurate values for a nn concentrated on kinematically complete nd breakup experiments [9][10][11][12] and on the negative pion-deuteron (π − d) capture reaction [13][14][15] with three and two nucleons, respectively, in the final state. In the first type of experiment, two outgoing neutrons with zero or small relative momentum are detected and the cross section in such a final-state interaction (FSI) configuration is measured.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Neutron-deuteron breakup experiment atEn=13MeV: Determination of the1
Trotter
¹
,
Meneses
²
,
Tornow
³

et al. 2006
Phys. Rev. C
72
0
4
0
View full text Add to dashboard Cite

We report on results of a kinematically complete neutron-deuteron breakup experiment performed at Triangle Universities Nuclear Laboratory using an E n = 13 MeV incident neutron beam. The 1 S 0 neutron-neutron scattering length a nn has been determined for four production angles of the neutron-neutron final-state interaction configuration. The absolute cross-section data were analyzed with rigorous three-nucleon calculations. Our average value of a nn = −18.7 ± 0.7 fm is in excellent agreement with a nn = −18.6 ± 0.4 fm obtained from capture experiments of negative pions on deuterons. We also performed a shape analysis of the final-state interaction cross-section enhancements by allowing the normalization of the data to float. From these relative data, we obtained an average value of a nn = −18.8 ± 0.5 fm, in agreement with the result obtained from the absolute cross-section measurements. Our result deviates from the world average of a nn = −16.7 ± 0.5 fm determined from previous kinematically complete neutron-deuteron breakup experiments, including the most recent one carried out at Bonn. However, this low value for a nn is at variance with theoretical expectation and other experimental information about the sign of charge-symmetry breaking of the nucleon-nucleon interaction. In agreement with theoretical predictions, no evidence was found of significant three-nucleon force effects on the neutron-neutron final-state interaction cross sections.

show abstract

Section: B Determination From the Shape Of The Nn Fsi Cross Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Neutron-deuteron breakup experiment atEn=13MeV: Determination of the1
Trotter
¹
,
Meneses
²
,
Tornow
³

et al. 2006
Phys. Rev. C
72
0
4
0
View full text Add to dashboard Cite

show abstract

On the Present Status of the Problem of Charge Dependence and Charge Asymmetry of the Nucleon‐Nucleon Force

Guratzsch

Kühn

1982

Annalen der Physik

View full text Add to dashboard Cite

A b s t r a c t . The charge dependence of the nucleon-nucleon force can be derived from the lowenergy scattering parameters. The p-p and n-p parameters were measured in direct scattering experiments. The n-n parameters a , , = (-16.70 j , 0.38) fm and r,, = (2.78 & 0.13) fm have been determined from few particle reactions. The difference of the scattering lengths (u,, -a,,) 4 7 fm demonstrates the violation of the charge independence. Information on the charge symmetry is still doubtful due to the inaccuracy of the charge correction for the p-p parameters. Whereas the n-n and the charge corrected p-p parameters known a t present yield a weaker n-n force than the p-p force, the opposite result follows from the binding energy difference for 3He and 3H and the meson theory of the nuclear forces.

show abstract

Neutron-neutron effective range parameters

1989

View full text Add to dashboard Cite

Neutron-neutron scattering length from the 2H(n, np)n reaction at bombarding energies up to 27 MeV

Cited by 13 publications

References 13 publications

Neutron-deuteron breakup experiment atEn=13MeV: Determination of the1
Trotter
¹
,
Meneses
²
,
Tornow
³

et al. 2006
Phys. Rev. C
72
0
4
0
View full text Add to dashboard Cite

Neutron-deuteron breakup experiment atEn=13MeV: Determination of the1
Trotter
¹
,
Meneses
²
,
Tornow
³

et al. 2006
Phys. Rev. C
72
0
4
0
View full text Add to dashboard Cite

On the Present Status of the Problem of Charge Dependence and Charge Asymmetry of the Nucleon‐Nucleon Force

Neutron-neutron effective range parameters

Contact Info

Product

Resources

About

Neutron-neutron scattering length from the 2H(n, np)n reaction at bombarding energies up to 27 MeV

Cited by 13 publications

References 13 publications

Neutron-deuteron breakup experiment atEn=13MeV: Determination of the1Trotter1, Meneses2, Tornow3 et al. 2006Phys. Rev. C72040View full textAdd to dashboardCite

Neutron-deuteron breakup experiment atEn=13MeV: Determination of the1Trotter1, Meneses2, Tornow3 et al. 2006Phys. Rev. C72040View full textAdd to dashboardCite

On the Present Status of the Problem of Charge Dependence and Charge Asymmetry of the Nucleon‐Nucleon Force

Neutron-neutron effective range parameters

Contact Info

Product

Resources

About

Neutron-deuteron breakup experiment atEn=13MeV: Determination of the1
Trotter
¹
,
Meneses
²
,
Tornow
³

et al. 2006
Phys. Rev. C
72
0
4
0
View full text Add to dashboard Cite

Neutron-deuteron breakup experiment atEn=13MeV: Determination of the1
Trotter
¹
,
Meneses
²
,
Tornow
³

et al. 2006
Phys. Rev. C
72
0
4
0
View full text Add to dashboard Cite