BO-08-22-13

Ba reactions

naturally occurring Isotope and their abundance

[math]{138 \atop\; }Ba(72%), {137 \atop\; }Ba(11%),{136 \atop\; }Ba (7.9%), {135 \atop\; }Ba(7%), {134 \atop\; }Ba(2%)[/math]

Single neutron knockout

[math]{137 \atop\; }Ba (\gamma,n){136 \atop \; }Ba[/math]

Neutron Separation Energy= Energy needed to liberate a neutron from the Nucleus

=[math]S_n = B({138 \atop 56} Au_{118})-B({{136} \atop 55} Au_{117})[/math]

[math]\left [79(1.007825 u) + 118 (1.008665 u) - 196.97 u\right ] \frac{931.5 MeV}{u} -\left [79(1.007825 u) + 117 (1.008665 u) - 195.967 u\right ] \frac{931.5 MeV}{u}[/math]

[math]=\left [(1.008665 u) - 196.9665516 u+ 195.9665513 u\right ] \frac{931.5 MeV}{u} = 5.3 MeV[/math]

Single proton knockout

[math]{137 \atop\; }Ba (\gamma,p){136 \atop \; }Cs[/math]

Cs-136

1.2 MeV

Run List

Run	Description
5792	Ba-133 source, TDC not getting hits
5820	empty, only counting with detector 180-3 (no TDC) 8 min 18 sec long, 396 Hz
5821	Ba-132, only counting with detector 180-3 (no TDC) 6 min 1 sec long, Hz
5889	Ba-133 source 129790 1.2 uCi, only counting with detector 180-3, TDC is back (someone changed the NIM->ECL connector polarity) 2 min 44 sec long, 1944 Hz, Det B HV OFF,
5900	Ba-133 source 129789 0.12 uCi, only counting with detector 180-3, 10 min 57 sec long, 378 Hz, Det B HV OFF,
5902	Ba-132 + Al rod 130100-012, only counting with detector 180-3 9 min 56sec long, 191 Hz
5908	Ba-133 0.1 uCi source # 129789 , Using both detectors in OR mode
5909	Ba-133 0.1 uCi source # 129789 , Using both detectors in OR mode , changed Det 180-2 threshold from 18 to 10 mV, 8 min 30 sec long, 783 Hz
5910	Ba-132 + Al rod 130100-012, Using both detectors in OR mode, 33 min 5 sec long, Hz
5912	Ba-133 0.1 uCi source # 129789 , Using both detectors OR mode , 4 min 21 sec long, 809 Hz
5913	Na-22 0.1 uCi source # 129741, Using both detectors OR mode, 4 min 8 sec long, 656 Hz
5914	Ba-132 + Al rod 130100-012, Using both detectors OR mode, 13 min 17 sec long, 470 Hz
5915	Ba-132 + Al rod 130100-012, Using both detectors AND mode, min sec long, Hz

PAA_8-22-13