Pion reactions with light nuclei at the 3-3 resonance

Chivers, D.T.; Rimmer, E.M.; Allardyce, B.W.; Witcomb, R.C.; Domingo, J.; Tanner, N.W.

doi:10.1016/0375-9474(69)90403-5

Cited by 85 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12 C(π + ,π+N) 11 C [34]: the cross section exhibits a broad resonance peak in the same region, reaching 45 mb around 160 MeV. Data are available up to 470 MeV, and show that the cross section reaches a plateau above 350 MeV.…”

Section: Depthmentioning

confidence: 96%

“…The only measurement available in the range above 100 MeV tells us that the cross section is in the range of a few µb, and therefore negligible. 34]: the cross sections exhibits a broad peak centered around the (3,3) resonance for the pion-nucleon quasi-elastic interaction (see Dropesky et al [34]) with a value of 70 mb at 190 MeV. Data are available up to 550 MeV, and show that the cross section reaches a plateau above 400 MeV.…”

Section: Cosmogenic Background In Deep Underground Detectorsmentioning

confidence: 99%

“…12 C(π − ,π − +n) 11 C [34]: the cross sections exhibits a broad peak centered around the (3,3) resonance for the pion-nucleon quasi-elastic interaction (see Dropesky et al [34]) with a value of 70 mb at 190 MeV. Data are available up to 550 MeV, and show that the cross section reaches a plateau above 400 MeV.…”

Section: Depthmentioning

confidence: 99%

See 2 more Smart Citations

CosmogenicC11production and sensitivity of organic scintillator detectors topepand CNO neutrinos

et al. 2005

View full text Add to dashboard Cite

Several possible background sources determine the detectability of pep and CNO solar neutrinos in organic liquid scintillator detectors. Among such sources, the cosmogenic 11 C nuclide plays a central role.11 C is produced underground in reactions induced by the residual cosmic muon flux. Experimental data available for the effective cross section for 11 C by muons indicate that 11 C will be the dominant source of background for the observation of pep and CNO neutrinos.11 C decays are expected to total a rate 2.5 (20) times higher than the combined rate of pep and CNO neutrinos in Borexino (KamLAND) in the energy window preferred for the pep measurement, between 0.8 and 1.3 MeV.This study examines the production mechanism of 11 C by muon-induced showers in organic liquid scintillators with a novel approach: for the first time, we perform a detailed ab initio calculation of the production of a cosmogenic nuclide, 11 C, taking into consideration all relevant production channels. Results of the calculation are compared with the effective cross sections measured by target experiments in muon beams.This paper also discusses a technique for reduction of background from 11 C in organic liquid scintillator detectors, which allows to identify on a one-by-one basis and remove from the data set a large fraction of 11 C decays. The background reduction technique hinges on an idea proposed by Martin Deutsch, who suggested that a neutron must be ejected in every interaction producing a 11 C nuclide from 12 C. 11 C events are tagged by a three-fold coincidence with the parent muon track and the subsequent neutron capture on protons.

show abstract

Section: Depthmentioning

confidence: 96%

Section: Cosmogenic Background In Deep Underground Detectorsmentioning

confidence: 99%

See 1 more Smart Citation

CosmogenicC11production and sensitivity of organic scintillator detectors topepand CNO neutrinos

et al. 2005

View full text Add to dashboard Cite

show abstract

“…Before 1979, measurements using activation technique could only give the angle-integrated cross sections (Chivers e_t al., 1969); for a detailed review of these work see Alster and Warszawski, (1979). The pion is a light, isovector (T=l) particle, which mediates the long range part of the nucleon-nucleon force.…”

mentioning

confidence: 99%

Pion nucleus single charge exchange reactions above the. delta. (1232) resonance

Rokni¹

1987

View full text Add to dashboard Cite

2.7 The CHj, carbon, and the carbon subtracted CtU spectra for 300 MeV incident n" beam 68 o _ o 2.8 The measured it spectrum for the Jl p->rt n at 300 MeV. The solid line represents the result of the Monte-Carlo calculations 69 o _ o 2.9 The measured JI spectrum for the n p-*n n at 425 MeV. The sol'* line represents the result of the Monte-Carlo calculations 70 o _ o 2.10 The measured n spectrum for the Jl p-»n n at 500 MeV. The solid line represents the result of the Monte-Carlo calculations 71 o o 2.11 The measured n spectrum for the it~p-»n n at 550 MeV. The solid line represents the result of the Monte-Carlo calculations 72 o 2.12 The acceptance of the n spectrometer vs. energy. The solid, chaindash, and dotted lines represent the acceptance at the first, second, and third angle bins, respectively. The mean scattering angle for each bin is given in table 2.4 2.13 The spectrometer efficiency for the first angle bin as defined by equation 2.18, vs. pion kinetic energy 2.14 The spectrometer efficiency vs. angle for 300 MeV (solid rectangular), 425 MeV (open circle), and 500 MeV (closed circle) pions 2.15 The deduced conversion efficiency of the glass elements vs. photon energy. The solid line represents the results obtained from equation 2.22 XI 3.12 Uncertainties involved in the IAS cross section measurements at 425 MeV for 90 Zr to 208 Pb 135 3.13 Uncertainties involved in the IAS cross section measurements at 500 MeV 136 3.14 Uncertainties involved in the IAS cross section measurements at 550 MeV 137 4.1 The values of g and a obtained from the fits of the expression g(N-Z)A~a to the 0° cross sections obtained in the experiment and the Glauber model 4.2 Parameters for the transition densities

show abstract

“…The production cross section of 10 C from n B at the (3, 3) resonance has been reported to be 0.85 mb. 5 Formation of 10 C from 11 B should follow a process similar to Reaction (2); that is 1 B{n\ 7l°P) 10 B <*">. 10 C.…”

mentioning

confidence: 99%

The Unresolved (π, πN) Puzzle

Karol

1976

Phys. Rev. Lett.

View full text Add to dashboard Cite

Pion reactions with light nuclei at the 3-3 resonance

Cited by 85 publications

References 6 publications

CosmogenicC11production and sensitivity of organic scintillator detectors topepand CNO neutrinos

CosmogenicC11production and sensitivity of organic scintillator detectors topepand CNO neutrinos

Pion nucleus single charge exchange reactions above the. delta. (1232) resonance

The Unresolved (π, πN) Puzzle

Contact Info

Product

Resources

About