Abstract
High resolution proton energy spectra from the4He(γ,p) reaction have been measured with tagged photons in the range Eγ = 130−525 MeV using the large Mainz NaI(T1) spectrometer atΘ labp =37.1°. Three separate reaction channels were identified, viz.4He(γ,p)t two-body breakup,4He photodisintegration via two-nucleon photon absorption processes and the quasifree pion production channel. Differential cross sections are presented for each of these channels as a function of photon energy. The sum of the two-nucleon photon absorption and the quasifree pion production differential cross sections, in the CM system, resembles that of the corresponding free-nucleon differential cross section when Fermi motion is taken into account.
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R.A. Arndt, R.L. Workman, Z. Li and L.D. Roper, Phys. Rev. C 42 (1990) 1853 and the code SAID, solution SM95
H. Arenhövel, Nucl. Phys. A 374 (1982) 521c
H. Arenhövel and M. Sanzone, Few-Body Systems Suppl. 3 Wien, Austria, Springer (1991) and references therein
P. Wilhelm and H. Arenhövel, Phys. Lett. B 318 (1993) 410
J. Arends, H.J. Gassen, A. Hegerath, B. Mecking, G. Nöldeke, P. Prenzel, T. Reichelt, A. Voswinkel and W.W. Sapp, Nucl. Phys. A412 (1984) 509;
E. De Sanctis, M. Anghinolfi, G.P. Capitani, P. Corvisiero, P. Di Giacomo, C. Guaraldo, V. Lucherini, E. Polli, A.R. Reolon, G. Ricco, M. Sanzone and A. Zucchiatti, Phys. Rev. C 34 (1986) 413;
J.L. Matthews, private communications (1990)
R. Crawford, J. Ahrens, S. Altieri, G. Audit, J.R.M. Annand, I. Anthony, R. Beck, A. Braghieri, N. D’Hose, S.J. Hall, V. Isbert, S. Kerhoas, J.D. Kellie, M. MacCormic, J.G. McGeorge, R. Medaglia, G.J. Miller, L.Y. Murphy, R.O. Owens, P. Pedroni, T. Pinelli, G. Tamas, P.A. Wallace, Nucl. Phys. A (submitted)
J. Ryckebusch, M. Vanderhaeghen, L. Machenil, M. Waroquier, Nucl. Phys. A 568 (1994) 828;
J. Ryckebusch, L. Machenil, M. Vanderhaeghen, V. Van der Sluys and M. Waroquier, Phys. Rev. C 49 (1994) 2704
C. Giusti, F.D. Pacati and M. Radici, Nucl. Phys. A 546 (1992) 607;
S. Boffi, C. Giusti, F.D. Pacati and M. Radici, Nucl. Phys. A 564 (1993) 473
R.C. Carrasco and E. Oset, Nucl. Phys. A 536 (1992) 445;
R.C. Carrasco, M.J. Vincente Vacas and E. Oset, Nucl. Phys. A 570 (1994) 701
G.E. Cross, I.J.D. MacGregor, J.C. McGeorge, J. Ahrens, I. Anthony, J.R.M. Annand, R. Beck, D. Branford, T. Davinson, P. Grabmayr. S.J. Hall, P.D. Harty, T. Hehl, J.D. Kellie, T. Lamparter, L. Machenil, J.A. MacKenzie, G.J. Miller, R.O. Owens, J. Ryckebusch, M. Sauer, R. Schneider, K. Spaeth and M. Vandenhaeghen, Nucl. Phys. A 593 (1995) 463
A. Braghieri, L. Y. Murphy, J. Ahrens, G. Audit, N. d’Hose, V. Isbert, S. Kerhoas, M. Mac Cormick, P. Pedroni, T. Pinelli, G. Tamas and A. Zabrodin, Phys. Lett. B 363 (1995) 46
D.I. Sober, H. Crannel, B.M.K. Nefkens, W.J. Briscoe, D.H. Fitzgerald, R. Goloskie and W.W. Sapp, Phys. Rev. C 28 (1983) 2234
V. Isbert, G. Audit, N. d’Hose, S. Kerhoas, M. Mac Cormic, G. Tamas, P.A. Wallace, S. Altieri, A. Braghieri, P. Pedroni, T. Pinelli, L.Y. Murphy, J. Ahrens, R. Beck, J. Peise, J.R.M. Annand, I. Antony, R. Crawford, S.J. Hall, J.D. Kellie, G.J. Miller, Nucl. Phys. A 578 (1994) 525
P.E. Argan, G. Audit, N. de Botn, J.-L. Faure, J.-M. Laget, J. Martin, C.G. Schuhl and G. Tamas, Nucl. Phys. A 237 (1975) 447
S.E. Kiergan, A.O. Hanson and L.J. Koester, Phys. Rev. C 8 (1973) 431
J. Arends, J. Eying, A. Hegerath, H. Hartmann, B. Mecking, G. Nöldeke and H. Rost, Nucl. Phys. A 322 (1979) 253
R.A. Schumacher, J.L. Mathews, W.W. Sapp, R.S. Turley, G.S. Adams and R.O. Owens, Phys. Rev. C 33 (1986) 50
H. Schmieden, I.J.D. MacGregor, R.O. Owens, B. Schoch, J.R.M. Annand, R. Beck, S.M. Doran, S.J. Hall, J.D. Kellie, J.C. MacGeorge and J.M. Vogt, Phys. Lett. B 314 (1993) 284
B. Schoch, Phys. Rev. Lett. 41 (1978) 80
S.M. Doran, I.J.D. MacGregor, J.R.M. Annand, I. Anthony, S.N. Dancer, S.J. Hall, J.D. Kellie, J.C. McGeorge, G.J. Miller, R.O. Owens, P.A. Wallace, B. Schoch, H. Schmieden and S. Klein, Nucl. Phys. A 559 (1993) 347
T. Emura, I. Endo, S. Endo, H. Itoh, S. Kato, M. Koike, K. Maeda, T. Maki, S. Maruo, K. Maruyama, Y. Murata, K. Niki, C. Rangacharyulu, A. Sasaki, T. Suda, Y. Sumi, Y. Wada and K. Yoshida, Phys. Lett. B 267 (1991) 460;
ibid. Phys. Lett. B 286 (1992) 229
S. Homma, M. Kanazawa, K. Maruyama, Y. Murata, H. Okuno, A. Sasaki and T. Taniguchi, Phys. Rev. Lett. 45 (1980) 706
S. Homma, M. Kanazawa, K. Maruyama, Y. Murata, H. Okuno, A. Sasaki and T. Taniguchi, Phys. Rev. C 27 (1983) 31
S. Homma, M. Kanazawa, M. Koike, Y. Murata, H. Okuno, F. Soga, N. Yoshikawa and A. Sasaki, Phys. Rev. Lett. 52 (1984) 2026
S. Homma, M. Kanazawa, M. Koike, Y. Murata, H. Okuno, F. Soga, M. Sudo, M. Torikoshi, N. Yoshikawa, A. Sasaki and Y. Fujii, Phys. Rev. Lett. 53 (1984) 2536
S. Homma, M. Koike, H. Okuno, M. Sudo, M. Torikoshi, A. Sasaki and Y. Fujii, Phys. Rev. C 36 (1987) 1623
M. Kanazawa, S. Homma, M. Koike, Y Murata, H. Okuno, F. Soga, N. Yoshikawa and A. Sasaki, Phys. Rev. C 35 (1987) 1828
K. Baba, I. Endo, H. Fukuma, K. Inoue, T. Kawamoto, T. Ohsugi, Y. Sumi, T. Takeshita, S. Uehara, Y. Yano and T. Maki, Nucl. Phys. A 415 (1984) 462
J. Arends, J. Eyink, H. Hartmann, A. Hegerath, B. Mecking, G. Nöldeke and H. Rost, Z. Phys. A 298 (1980) 103;
J. Arends, P. Detemple, N. Floss, S. Huthmacher, G. Kaul, B. Mecking, G. Nöldeke and R. Stenz, Nucl. Phys. A 526 (1991) 479
F. Wissmann, J. Peise, M. Schmitz, M. Scheider, J. Ahrens, I. Anthony, R. Beck, B. Dolbilkin, S.J. Hall, F. Härter, S. Herdade, J. Herrmann, A. Hünger, P. Jennewein, J.D. Kellie, R. Kondratjev, H.-P. Krahn, K.-H. Krause, V. Kusnetzov, V. Lisin, G.J. Miller, A. Polonski, M. Schumacher, J. Sobolewki, Th. Walcher and A. Zabrodin, Phys. Letters B335 (1994) 119
H. Herminghaus, A. Feder, K.H. Kaiser, W. Manz and H. v.d. Schmitt, Nucl. Instr. Meth. 138 (1976) 1;
H. Herminghaus, K.H. Kaiser and U. Ludwig, Nucl. Instr. Meth. 187 (1981) 103;
H. Herminghaus, Proc. 1990 Lin. Accel. Conf., Albuquerque, USA
I. Anthony, J.D. Kellie, S.J. Hall, G.J. Miller and J. Ahrens, Nucl. Instr. Meth. A 301 (1991) 230;
S.J. Hall et al., Nucl. Instr. Meth., in press
R.R. Wilson, Nucl. Instr. Meth. 1 (1957) 101
R. Brun et al., GEANT Detector Description and Simulation Tool, CERN Program Library Long Writeup W5013, CERN Geneva Switzerland 1993
O. Selke, A. Hünger, A. Kraus, M. Schumacher, R. Wichmann, J. Ahrens, H.J. Arends, R. Beck, J. Peise, M. Schneider and F. Wichmann, Phys. Lett. B 369 (1996) 207
K.G. Dedrick, Rev. Mod. Phys. 34 (1962) 429
D.R. Tilley, H.R. Weller and G.M. Hale, Nucl. Phys. A 541 (1992) 1
D.F. Measday, Nucl. Instr. Meth. 34 (1965) 353;
D.F. Measday and C. Richard-Serre, Nucl. Inst. Meth. 76 (1969) 45
C.A. Goulding and J.G. Rogers, Nucl. Instr. Meth. 153 (1978) 511
J.M. Laget, Nucl. Phys. A 579 (1994) 333
J. Levinger, Phys. Rev. 84 (1951) 43;
K. Gottfried, Nucl. Phys. 5 (1958) 557;
W. Weise, M.G. Huber and M. Danos, Z. Phys.236 (1970) 176
A.I. Milstein and M.T. Hütt, private communication
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Communicated by T. Walcher
Supported by Deutsche Forschungsgemeinschaft (SFB 201)
Excerpt from a Diploma Thesis, Göttingen 1995
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Wichmann, R., Ahrens, J., Arends, H.J. et al. Photoemission of protons from4He in theΔ-resonance region. Z. Physik A — Hadrons and Nuclei 355, 169–177 (1996). https://doi.org/10.1007/BF02769681
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DOI: https://doi.org/10.1007/BF02769681