Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/14316
Title: <span style="font-size:10.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-US">Neutron measurement in <sup>12,13</sup>C + <sup>27</sup>Al system using CR-39 detectors and neutron rem meter</span>
Authors: Sahoo, G S
Tripathy, S P
Shanbhag, A A
Sunil, C
Joshi, D S
Sarkar, P K
Keywords: Neutron dosimetry
CR-39 track detector
Heavy ion reactions
Issue Date: Jul-2012
Publisher: NISCAIR-CSIR, India
Abstract: <span style="font-size:10.0pt;font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-US">In this work, neutron measurements<span style="font-size: 10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-bidi-font-family:mangal;mso-ansi-language:en-us;mso-fareast-language:ja;="" mso-bidi-language:hi"="" lang="EN-US"> were<span style="font-size:10.0pt; font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-bidi-font-family:mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-US"> carried out for the interaction of 60 and 67.5 MeV <sup>12</sup>C, 57.3 and 65 MeV <sup>13</sup>C ions with thick aluminium target by using CR-39 detectors and neutron rem meter. Both the detector systems were irradiated at different angles viz. 0<span style="font-size:10.0pt; font-family:Symbol;mso-ascii-font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-hansi-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:="" hi;mso-char-type:symbol;mso-symbol-font-family:symbol"="" lang="EN-US">°<span style="font-size:10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-US">, 30<span style="font-size:10.0pt;font-family:Symbol;mso-ascii-font-family:" times="" new="" roman";="" mso-fareast-font-family:"times="" roman";mso-hansi-font-family:"times="" mso-bidi-font-family:mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:hi;mso-char-type:symbol;mso-symbol-font-family:symbol"="" lang="EN-US">°<span style="font-size:10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-US">, 60<span style="font-size:10.0pt;font-family:Symbol;mso-ascii-font-family:" times="" new="" roman";="" mso-fareast-font-family:"times="" roman";mso-hansi-font-family:"times="" mso-bidi-font-family:mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:hi;mso-char-type:symbol;mso-symbol-font-family:symbol"="" lang="EN-US">°<span style="font-size:10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-US">, 90<span style="font-size:10.0pt;font-family:Symbol;mso-ascii-font-family:" times="" new="" roman";="" mso-fareast-font-family:"times="" roman";mso-hansi-font-family:"times="" mso-bidi-font-family:mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:hi;mso-char-type:symbol;mso-symbol-font-family:symbol"="" lang="EN-US">°<span style="font-size:10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-US"> with respect to the beam direction. The normalized track density (tracks cm<sup><span style="font-size:10.0pt;font-family:Symbol;mso-ascii-font-family:" times="" new="" roman";="" mso-fareast-font-family:"times="" roman";mso-hansi-font-family:"times="" mso-bidi-font-family:mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:hi;mso-char-type:symbol;mso-symbol-font-family:symbol"="" lang="EN-US">-<span style="font-size:10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-US">2</span></span></sup><span style="font-size:10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-US"> projectile<sup><span style="font-size:10.0pt;font-family:Symbol;mso-ascii-font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-hansi-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:hi;mso-char-type:symbol;="" mso-symbol-font-family:symbol"="" lang="EN-US">-<span style="font-size:10.0pt;font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-US">1</span></span></sup><span style="font-size:10.0pt;font-family:" times="" new="" roman";="" mso-fareast-font-family:"times="" roman";mso-bidi-font-family:mangal;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-US"> at 1 m) in CR-39 detectors was correlated with the normalized dose equivalent values (µSv projectile<sup><span style="font-size:10.0pt;font-family: Symbol;mso-ascii-font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-hansi-font-family:"times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:="" en-us;mso-fareast-language:en-us;mso-bidi-language:hi;mso-char-type:symbol;="" mso-symbol-font-family:symbol"="" lang="EN-US">-<span style="font-size:10.0pt;font-family: " times="" new="" roman";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-US">1</span></span></sup><span style="font-size:10.0pt;font-family:" times="" new="" roman";="" mso-fareast-font-family:"times="" roman";mso-bidi-font-family:mangal;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-US"> at 1 m) obtained using the neutron rem meter. The track density was found to be more in case of <sup>13</sup>C than <sup>12</sup>C. However in all the cases, the track density per incident projectile was found to decrease as the angle with respect to beam direction increases, indicating non-isotropic nature of neutron emission. The ratio between measured dose equivalent in rem meter to the measured track densities in CR-39 detectors was found to be (2.8±0.2)<span style="font-size:10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-in;="" mso-fareast-language:en-in;mso-bidi-language:hi"="" lang="EN-US"> <span style="font-size:10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-in;="" mso-fareast-language:en-us;mso-bidi-language:hi"="">µSv<span style="font-size:10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:="" "times="" roman";mso-bidi-font-family:mangal;mso-ansi-language:en-in;="" mso-fareast-language:ja;mso-bidi-language:hi"=""> <span style="font-size: 10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-bidi-font-family:mangal;mso-ansi-language:en-in;mso-fareast-language:en-us;="" mso-bidi-language:hi"="">cm<sup>2</sup><span style="font-size: 10.0pt;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-bidi-font-family:mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-US">, which remains constant irrespective of the change in angle with respect to the beam direction as well as in neutron energy distribution, indicating a flat dose response of CR-39 detectors. </span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
Description: 513-516
URI: http://hdl.handle.net/123456789/14316
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.50(07) [July 2012]

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