Fabrication of the gold (Au) backed T130e targets for in-beam gamma-ray spectroscopy

Neelam; Suresh Kumar; S. R. Abhilash; G. R. Umapathy; D. Kabiraj; D. Mehta

doi:10.1016/j.vacuum.2019.108961

Fabrication of the gold (Au) backed T130e targets for in-beam gamma-ray spectroscopy

Neelam, Suresh Kumar, S. R. Abhilash, G. R. Umapathy, D. Kabiraj, D. Mehta

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The isotopically enriched T130e targets of ~ 1.2 mg/cm² thickness were fabricated on 4–6 mg/cm² gold (Au) backing. The vapor deposition method was employed using the resistive heating technique. To minimize the material consumption and increase the deposition efficiency, an indigenously developed graphite crucible with 1 mm opening was used to deposit T130e metal powder at a minimum source to substrate distance of 2 cm. A heat shield was placed at 1 cm above the graphite crucible to dissipate the heat. The fabrication of these targets were successfully achieved by using 10 mg of metal powder in each evaporation. The fabricated targets were characterized by using X-ray Fluorescence (XRF) measurements, Energy Dispersive X-ray Spectroscopy (EDS) and Scanning Electron Microscope (SEM). An experiment to study the nuclear structure via in-beam γ-ray spectroscopy was preformed using one of the fabricated T130e targets. The T130e(B9e,xn) reaction was used to populate the intermediate and high-spin states of Ba isotopes with B9e beam at 36- and 48 MeV lab energy. The relative percentage (%) cross-sections were measured for the B134−136a nuclei and found to be in agreement with the PACE4 calculations.

Original language	English
Article number	108961
Journal	Vacuum
Volume	170
DOIs	https://doi.org/10.1016/j.vacuum.2019.108961
State	Published - Dec 2019
Externally published	Yes

Bibliographical note

Funding Information:
One of the authors (Neelam), would like to acknowledge the financial assistance received at University of Delhi from the University Grant Commission (UGC), New Delhi, India via IUAC projects (UFR - 51320, 62337). The financial support from the Department of Science and Technology (DST), India for the INGA project (No. IR/S2/PF-03/2003-I) is also gratefully acknowledged. The authors also acknowledge the IUAC support for providing the necessary facilities to carry out an experiment in INGA facility and to fabricate the targets and extending FESEM-EDS facility, funded by MoES under Geochronology project.

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

EDS
Enriched T130e target
Fusion evaporation reaction
High vacuum evaporation
Relative percentage (%) cross-sections
Review on Te target fabrication techniques
SEM
X-ray fluorescence measurements

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title = "Fabrication of the gold (Au) backed T130e targets for in-beam gamma-ray spectroscopy",

abstract = "The isotopically enriched T130e targets of ~ 1.2 mg/cm2 thickness were fabricated on 4–6 mg/cm2 gold (Au) backing. The vapor deposition method was employed using the resistive heating technique. To minimize the material consumption and increase the deposition efficiency, an indigenously developed graphite crucible with 1 mm opening was used to deposit T130e metal powder at a minimum source to substrate distance of 2 cm. A heat shield was placed at 1 cm above the graphite crucible to dissipate the heat. The fabrication of these targets were successfully achieved by using 10 mg of metal powder in each evaporation. The fabricated targets were characterized by using X-ray Fluorescence (XRF) measurements, Energy Dispersive X-ray Spectroscopy (EDS) and Scanning Electron Microscope (SEM). An experiment to study the nuclear structure via in-beam γ-ray spectroscopy was preformed using one of the fabricated T130e targets. The T130e(B9e,xn) reaction was used to populate the intermediate and high-spin states of Ba isotopes with B9e beam at 36- and 48 MeV lab energy. The relative percentage (%) cross-sections were measured for the B134−136a nuclei and found to be in agreement with the PACE4 calculations.",

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author = "Neelam and Suresh Kumar and Abhilash, {S. R.} and Umapathy, {G. R.} and D. Kabiraj and D. Mehta",

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Fabrication of the gold (Au) backed T130e targets for in-beam gamma-ray spectroscopy

Abstract

Bibliographical note

Keywords

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