Mechanism of the forward-angle <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn></mn><mo>(</mo><mi>d</mi><mo>,</mo><mi>p</mi><mi>n</mi><mo>)</mo><mn></mn></math></span> reaction at intermediate energies

H. Okamura; S. Ishida; N. Sakamoto; H. Otsu; T. Uesaka; T. Wakasa; H. Sakai; T. Niizeki; H. Toyokawa; Y. Tajima; H. Ohnuma; M. Yosoi; K. Hatanaka; T. Ichihara

doi:10.1103/PhysRevC.58.2180

Mechanism of the forward-angle $(d, p n)$ reaction at intermediate energies

H. Okamura, S. Ishida, N. Sakamoto, H. Otsu, T. Uesaka, T. Wakasa, H. Sakai, T. Niizeki, H. Toyokawa, Y. Tajima, H. Ohnuma, M. Yosoi, K. Hatanaka, and T. Ichihara

Phys. Rev. C 58, 2180 – Published 1 October 1998

Abstract

The elastic breakup of the deuteron has been measured in a kinematical condition of $θ_{p} = θ_{n} = 0 °$ at $E_{d} = 140 MeV$ and 270 MeV on seven targets ranging from $Z = 6$ to 82. A double-peaked structure with its minimum at $E_{p} ≃ E_{n}$ is observed for all the measured triple-differential cross sections, which indicates a large contribution from Coulomb breakup. While a symmetric shape is expected for an $E 1$ transition, the observed proton-energy distribution is asymmetric, showing considerable dependence on both the target and the incident energy. These data and previous data at 56 MeV have been analyzed using the post-form of the distorted-wave Born approximation (DWBA) theory. Although the calculations account reasonably well for the asymmetric shape, by including the nuclear potential, they consistently overestimate the magnitudes of the cross sections over the whole measured region. Limitations of the post-form DWBA are discussed.

Received 23 March 1998

DOI:https://doi.org/10.1103/PhysRevC.58.2180

Authors & Affiliations

H. Okamura^1,*, S. Ishida^1,†, N. Sakamoto^1,‡, H. Otsu^1,§, T. Uesaka^1,‡, T. Wakasa^1,∥, H. Sakai¹, T. Niizeki^2,¶, H. Toyokawa^2,**, Y. Tajima^2,††, H. Ohnuma^2,‡‡, M. Yosoi³, K. Hatanaka⁴, and T. Ichihara⁵

¹Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
²Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
³Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
⁴Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
⁵The Institute of Physical and Chemical Research (RIKEN), Saitama 351-0198, Japan

^*Present address: Department of Physics, Saitama University, Saitama 338-8570, Japan. Electronic address: okamura@phy.saitama-u.ac.jp
^†Present address: Soei International Patent Firm, Tokyo 104-0031, Japan.
^‡Present address: The Institute of Physical and Chemical Research (RIKEN), Saitama 351-0198, Japan.
^§Present address: Department of Physics, Tohoku University, Sendai 980-8578, Japan.
^∥Present address: Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan.
^¶Present address: Department of Home Economics, Tokyo Kasei University, Tokyo 173-8602, Japan.
^**Present address: Japan Synchrotron Radiation Research Institute (JASRI), Akou 678-1298, Japan.
^††Present address: Cyclotron and Radioisotope Center, Tohoku University, Sendai 980-8578, Japan.
^‡‡Present address: Chiba Institute of Technology, Narashino, Chiba 275-8588, Japan.

References (Subscription Required)

Click to Expand

Issue

Vol. 58, Iss. 4 — October 1998

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review C

covering nuclear physics