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proton-capture on 118Te

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Message ID: 277 Entry time: Thu Apr 23 19:09:58 2020

Author:	Laszlo
Category:	Calibration
Subject:	theoretical K-REC cross sections
Year:

Find attached Andrey Surzhykov's calculations for the theta angle in respect to the beam direction (in lab. frame) vs. cross section for 124Xe54+ and 118Te52+.
The calculations made for collision with two H atoms with the accuracy of 1%. There are no molecular corrections done, but these corrections are within 1%.

The photon-emission is symmetrical in the azimuthal phi angle, but asymetric in theta. The K-REC cross section is given for each integer theta angle. The problem is that our 90° and 145° xray detectors cover more integer theta-angles --> The disk shaped entrance window of the Xray-detectors is sliced for each covered theta angles, and the CS values are averaged together with the weights of the area of the corresponding slice. The 35° det had a non-disk shaped slit collimator! Was it aligned vertical or horizontal or random? I assumed that it had a vertical position --> only cs at theta=35° needs to taken into account

	90°	145°	35°
weighted cs_Xe [barn/sr]	128,444	41,967	45,550
weighted cs_Te [barn/sr]	118,616	38,918	41,740

For the steradian values I calculated the area of the entrance window of the Xray detectors and I divided it with the area of the sphere with radius = distance between source and det. If r=radius of the entrance window, D=distance between source and det.: covered steradian = r^2*pi/(4*pi*D^2) [%], covered steradian = 4Pi*[r^2*pi/(4*pi*D^2)] [4pi]. This is valid for the 90° and 145° Xray detectors. The area of 35° det. was calculated individually.

	90°	145°	35°
sr [%]	0,00237	0,00076	0,00002
sr [4pi]	0,0298	0,0096	0,00030

I converted barn/sr to barn in the following way: steradian[4pi]*weigthed_cs [barn/sr] = weigthed_cs [barn]. I am not 100% sure if I need here the steradian in [4pi] or in [%].

	90°	145°	35°
weighted cs_Xe [barn]	3,8247	0,4012	0,0137
weighted cs_Te [barn]	3,5321	0,3720	0,0125

Attachment 1:

CS_theory_all.png 55 kB Uploaded Wed May 6 23:09:55 2020 | Hide | Hide all | Show all

Attachment 2:

CS_theory_all.ps 45 kB Uploaded Wed May 6 23:10:06 2020 | Show | Hide all | Show all

Attachment 3:

CS_theory_90Xe.png 31 kB Uploaded Wed May 6 23:10:18 2020 | Hide | Hide all | Show all

Attachment 4:

CS_theory_90Xe.ps 22 kB Uploaded Wed May 6 23:10:27 2020 | Hide | Hide all | Show all

Cannot create thumbnail, please check ImageMagick installation

Attachment 5:

CS_theory_90Te.png 29 kB Uploaded Wed May 6 23:10:36 2020 | Hide | Hide all | Show all

Attachment 6:

CS_theory_90Te.ps 22 kB Uploaded Wed May 6 23:10:44 2020 | Show | Hide all | Show all

Attachment 7:

DCS_Z_54_Tp_10MeV.dat 4 kB Uploaded Wed May 6 23:10:52 2020 | Hide | Hide all | Show all

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Attachment 8:

DCS_Z_52_Tp_10MeV.dat 4 kB Uploaded Wed May 6 23:11:02 2020 | Show | Hide all | Show all

Attachment 9:

source_vs_XrayDet_sketch.pdf 40 kB Uploaded Wed May 6 23:11:19 2020 | Show | Hide all | Show all

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