Evaluation of n–<sup>12</sup>C scattering between 7 and 26 MeV

Chen, Z P; Tornow, W.

doi:10.1088/0954-3899/31/11/010

Cited by 9 publications

(12 citation statements)

References 23 publications

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“…5), both the predicted and measured Tornow [26] (in the following text referred to as CT) is in good agreement with our data at E n = 6.94 MeV. As can be seen from the n-12 C total cross section (see Fig.…”

Section: Resultssupporting

confidence: 88%

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Measurements ofAy(θ)forC12
Roper
¹
,
Tornow
²
,
Braun
³

et al. 2005
Phys. Rev. C
8
1
9
0
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The analyzing power A y (θ ) for neutron elastic scattering from 12 C has been measured for 33 neutron energies between E n = 2.2 and 8.5 MeV in the angular range from 25 • to 145 • in the laboratory system. The primary motivation for these measurements is the need for an accurate knowledge of A y (θ) for 12 C(n, n) 12 C elastic scattering to enable corrections to high-precision neutron-proton and neutron-deuteron A y (θ) data in the neutronenergy range below E n = 30 MeV. In their own right, 12 C(n, n) 12 C A y (θ) data are of crucial importance for improving both the parametrization of n-12 C scattering and our knowledge of the level scheme of 13 C. The present A y (θ ) data are compared with published data and previous phase-shift-analysis results.

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Section: Resultssupporting

confidence: 88%

“…However, because the Q value for the 2 H(d, n) 3 He reaction is +3. 26 MeV compared with Q = −2.23 MeV for the highest-energy neutrons from the deuteron breakup reactions, the monoenergetic neutrons can easily be resolved from the deuteron breakup neutrons by time-of-flight (TOF) spectroscopy.…”

Section: Neutron Beammentioning

confidence: 99%

Measurements ofAy(θ)forC12
Roper
¹
,
Tornow
²
,
Braun
³

et al. 2005
Phys. Rev. C
8
1
9
0
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“…produced by the Gauss potential (25) at scattering energy E = 18 au. Shifted angular momenta L corresponding to solution of equations (9) taken from the phase shift data of [8] for n scattering by 12 C nucleus at the energy E lab n = 10 MeV. Real (left column) and imaginary (right column) part of the shifted angular momenta L listed under headings CT, A, and L, respectively, correspond to solutions of equations (9), (17), or (18), and (24).…”

Section: Gauss Potentialmentioning

confidence: 99%

Simplified solutions of the Cox–Thompson inverse scattering method at fixed energy

Palmai¹,

Horváth²,

Apagyi³

2008

J. Phys. A: Math. Theor.

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“…However, because Ref. [9] left a gap between 7.0 and 7.5 MeV, we supplemented the database with distributions taken from the PSA of Chen and Tornow [11]. This modification also made small but significant changes to the PDE corrections.…”

mentioning

confidence: 99%

“…For the highest-energy regime, from 8.5 to 12.0 MeV, the A y (θ ) of 12 C is relatively smooth, and we used the PSA of Ref. [11] exclusively.…”

mentioning

confidence: 99%

Corrections for the polarization-dependent efficiency and new neutron-proton analyzing power data at 7.6 MeV

2010

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We present new corrections for the polarization-dependent efficiency (PDE), which introduces a false asymmetry into measurements of n-p analyzing power A y (θ) caused by double scattering in the neutron side detectors. To accomplish this, we created a new database of 12 C( n,n) A y (θ) by using a combination of fits to data, phase-shift analysis, and R-matrix analysis. Our recorrection for PDE of previously reported n-p A y (θ) data at 7.6 and 12.0 MeV and new data at 7.6 MeV indicate that we have achieved a superior representation of 12 C( n,n). Our results continue to suggest a possible charge dependence of the pion-nucleon coupling constant.The motivation for collecting high-precision neutronproton (n-p) analyzing power A y (θ ) data is to test the accuracy of nucleon-nucleon (NN) phase-shift analysis (PSA) predictions for this observable. At low energy, n-p A y (θ ) depends greatly on the 3 P 0 , 3 P 1 , and 3 P 2 phase shifts and good-quality data can be useful in constraining these parameters. Nearly two decades ago, Triangle Universities Nuclear Laboratory (TUNL) collected n-p A y (θ ) data at E n = 7.6, 12.0, 14.0, 16.0, and 18.0 MeV [1]. In terms of uncertainties, these data were of similar quality as earlier measurements by Holslin and co-workers [2] at E n = 10.03 MeV. None of these data were of adequate precision to show clear discrepancies with the Nijmegen PSA predictions [3]. Reference [1] also found that data from 14 to 20 MeV probably would not be able to demonstrate discrepancies with NN predictions, since there is less difference between the various theoretical models in this energy range.

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Evaluation of n–¹²C scattering between 7 and 26 MeV

Cited by 9 publications

References 23 publications

Measurements ofAy(θ)forC12
Roper
¹
,
Tornow
²
,
Braun
³

et al. 2005
Phys. Rev. C
8
1
9
0
View full text Add to dashboard Cite

Measurements ofAy(θ)forC12
Roper
¹
,
Tornow
²
,
Braun
³

et al. 2005
Phys. Rev. C
8
1
9
0
View full text Add to dashboard Cite

Simplified solutions of the Cox–Thompson inverse scattering method at fixed energy

Corrections for the polarization-dependent efficiency and new neutron-proton analyzing power data at 7.6 MeV

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Evaluation of n–12C scattering between 7 and 26 MeV

Cited by 9 publications

References 23 publications

Measurements ofAy(θ)forC12Roper1, Tornow2, Braun3 et al. 2005Phys. Rev. C8190View full textAdd to dashboardCite

Measurements ofAy(θ)forC12Roper1, Tornow2, Braun3 et al. 2005Phys. Rev. C8190View full textAdd to dashboardCite

Simplified solutions of the Cox–Thompson inverse scattering method at fixed energy

Corrections for the polarization-dependent efficiency and new neutron-proton analyzing power data at 7.6 MeV

Contact Info

Product

Resources

About

Evaluation of n–¹²C scattering between 7 and 26 MeV

Measurements ofAy(θ)forC12
Roper
¹
,
Tornow
²
,
Braun
³

et al. 2005
Phys. Rev. C
8
1
9
0
View full text Add to dashboard Cite

Measurements ofAy(θ)forC12
Roper
¹
,
Tornow
²
,
Braun
³

et al. 2005
Phys. Rev. C
8
1
9
0
View full text Add to dashboard Cite