Charged pion photoproduction from 10B and 13C

doi:10.1016/0375-9474(83)90625-5

Nuclear Physics A

Volume 403, Issue 3, 25 July 1983, Pages 607-624

https://doi.org/10.1016/0375-9474(83)90625-5 Get rights and content

Abstract

Positive and negative pion photoproduction cross sections from ¹⁰B and ¹³C leading to the ground state of the residual nucleus have been calculated in the plane-wave and distorted-wave impulse approximations. The results are compared with experiment and with other theoretical calculations. While a large discrepancy is observed between experiment and theory in the case of negative pion photoproduction from ¹³C, fair agreement is obtained between experiment and the plane-wave calculations in all other reactions. It is found that in all reactions studied, except in the case of positive pion production from ¹³C, the inclusion of the pion-wave distortions moves the theory away from the experimental points. It is also found that the photopion differential-cross-section calculations show a sensitivity to the nuclear wave function different from that predicted by the electron scattering form-factor calculations.

References (30)

S. Cohen et al.
Nucl. Phys.
(1965)
R.A. Eisenstein et al.
Comp. Phys. Comm.
(1974)
H.K. Lee et al.
Nucl. Phys
(1971)
S. Maleki
M. Yamazaki
E.J. Ansaldo et al.
Nucl. Phys.
(1979)
N. Freed and P. Ostrander, Z. Phys., to be...N. Freed, private communication,...
W.N. Polyzou et al.
preprint LA-UR-80-3439
(1981)
Phys. Rev. C, to be...
S. Dytman, private communication,...
K.K. Min and E.J. Winhold, private communication,...

D. Rowley

J.J. LeRose

M. Yamazaki

P.E. Bosted

G.F. Chew et al.

Phys. Rev.

(1957)

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Cross sections for the exclusive photoproduction reaction ¹³C(γ,π⁻)¹³N_gs were measured at energies across the resonance region. To focus on the resonant production mechanism the measurements were carried out at a fixed nuclear momentum transfer of Q = 1 fm⁻¹. For a test of the non-resonant production and of the nuclear transition matrix element, data at Q = 1.25 fm⁻¹ and a differential cross section at 223 MeV photon energy were taken. There are sizeable discrepancies between our measurements and the theoretical predictions.
A measurement of the photopion reaction 13C(γ, π-)13N<inf>g.s.</inf> at a pion kinetic energy of 48 MeV
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The Amsterdam electron accelerator facility was used to measure the differential cross section for pions of 48 MeV kinetic energy produced in the reaction between mirror states $^{13} C (γ, π^{−})^{13} N_{g.s.}$ , at pion angles 65°, 100° and 125°. The measured cross sections are larger than previously reported measurements at θ_π = 900deg; and T_π = 42 MeV, but smaller than theoretical calculations. Excited state transitions were also measured.
Watson's theorem and resonant pion photoproduction amplitude in the delta channel
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The CGLN and BL theories of the pion photoproduction on nucleons, used in nuclear calculations, are examined regarding their predictions of the resonant M₁+ and E₁+ multipoles. The nonunitary BL approach violates Watson's theorem, and predicts these multipoles poorly. In the static limit, the CGLN multipoles satisfy Watson's theorem and are in fine agreement with data. The unitarized BL multipoles agree with those from the Olsson theory and data.
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^∗: Present address: Department of Chemical & Environmental Engineering, Rensselaer Polytechnic Institute, Troy, New York 12181, USA.

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Nuclear Physics A

Abstract

References (30)

Nucl. Phys.

Comp. Phys. Comm.

Nucl. Phys

Nucl. Phys.

preprint LA-UR-80-3439

Phys. Rev.

Cited by (8)

A study of the role of the Δ-resonance in the reaction <sup>13</sup>C(γ,π<sup>-</sup>)<sup>13</sup>N<inf>gs</inf>

A measurement of the photopion reaction <sup>13</sup>C(γ, π<sup>-</sup>)<sup>13</sup>N<inf>g.s.</inf> at a pion kinetic energy of 48 MeV

Watson's theorem and resonant pion photoproduction amplitude in the delta channel

Angular distributions of + in the (10,+) reaction leading to low-lying states of Be10

Precise test for the unitarized pion photoproduction impulse amplitude in exclusive nuclear reactions

Nuclear wave function considerations in pion photoproduction