Difference between revisions of "July 6, 2007 Neutron Capture in lead"
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| + | Paraffin wax layer of thickness 12.6 cm was used as a neutron attenuator and for cosmic rays lead of thickness 10 cm on sides of HpGe detector. The source was Cf-252 without and with lead container of 60μCi activity.<br> | ||
| + | |||
== 1. Energy Region 100-500 keV == | == 1. Energy Region 100-500 keV == | ||
[[Image:with_lead_without_CF_252_gamma_spectra100_500.jpg]] | [[Image:with_lead_without_CF_252_gamma_spectra100_500.jpg]] | ||
| − | == 2. Energy Region 500-900 keV== | + | == 2. Energy Region 500-900 keV == |
| − | [[Image:with_lead_without_CF_252_gamma_spectra500_900.jpg]] | + | |
| + | [[Image:with_lead_without_CF_252_gamma_spectra500_900.jpg]]<br> | ||
| + | We have sharp peak on 803 keV, which is the result of the lead container. This line coressponds to thermal-neutron capture in lead Pb-206.[http://prola.aps.org/pdf/PR/v95/i6/p1482_1]. However, 388 kev and 333 kev, energy lines of Cf-249 are more dominant without lead.<br> | ||
| + | For energy line 803 keV ( # of counts without lead / # of count with lead ) =0.5 | ||
| + | |||
| + | [http://arxiv.org/abs/0707.3679 (n,<math>\gamma) from Pb-206 from 1 ev to 600 keV</math>] | ||
Latest revision as of 14:20, 26 July 2007
Paraffin wax layer of thickness 12.6 cm was used as a neutron attenuator and for cosmic rays lead of thickness 10 cm on sides of HpGe detector. The source was Cf-252 without and with lead container of 60μCi activity.
1. Energy Region 100-500 keV
2. Energy Region 500-900 keV
We have sharp peak on 803 keV, which is the result of the lead container. This line coressponds to thermal-neutron capture in lead Pb-206.[1]. However, 388 kev and 333 kev, energy lines of Cf-249 are more dominant without lead.
For energy line 803 keV ( # of counts without lead / # of count with lead ) =0.5