Cross-Section Calculation and Investigation of Level Density Models for (p,n) and (p,3n) Reactions on 151,153Eu Isotopes

Year 2018, , 132 - 143, 30.11.2018

Mert Şekerci , Abdullah Kaplan

https://doi.org/10.29233/sdufeffd.462199

Cited By: 4

Abstract

Europium
is a lanthanide group metal used in different areas such as the production of
thin superconducting structures, generating the colors on televisions and
monitors, biomedical applications, brachytherapy and nuclear reactor control
rods. In this study; reaction cross–section calculations of ^151,153Eu
isotopes on (p,n) and (p,3n) reactions have been carried out using theoretical
nuclear reaction models that have developed for the use in cases of being able
to reach experimental data. The cross–section can be measured experimentally or
can be calculated theoretically, when it is not possible, and can be defined as
the value that expresses the probability of a reaction’s occurring in the
simplest way. The calculations have been carried out by selecting equilibrium
and pre-equilibrium models in computer-aided TALYS 1.8 and EMPIRE 3.2 codes which
have been developed for the use of different theoretical models. The model that
produces the results that are most compatible with the experimental data has
been determined by the analysis of relative variance and the computational
effects of different level intensity models were investigated. The obtained
theoretical calculation results have been compared with the experimental data taken
from International Experimental Nuclear Data Library (EXFOR) database and
theoretical data taken from TENDL 2017 database.

Keywords

Cross – section, Level density, TALYS 1.8, EMPIRE 3.2, Europium

151,153Eu İzotoplarında (p,n) ve (p,3n) Reaksiyonları için Tesir Kesiti Hesaplamaları ve Seviye Yoğunluğu Modellerinin İncelenmesi

Abstract

Evropiyum; ince
süperiletken yapıların üretilmesi, televizyon ve monitörlerde renklerin elde
edilmesi, biyomedikal uygulamalar, brakiterapi ve nükleer reaktör kontrol
çubukları gibi farklı alanlarda kullanılan lantanit grubu bir metaldir. Bu
çalışmada; deneysel verilere ulaşmanın mümkün olmadığı durumlarda kullanılmak
amacıyla geliştirilmiş teorik nükleer reaksiyon modelleri kullanılarak, ^151,153Eu
izotoplarının (p,n) ve (p,3n) reaksiyonlarındaki tesir kesiti hesaplamaları
gerçekleştirilmiştir. Tesir kesiti; deneysel olarak ölçülebileceği gibi, bunun
mümkün olmadığı durumlarda teorik olarak da hesaplanabilmektedir ve en basit
şekilde bir reaksiyonun meydana gelme olasılığını ifade eden değer olarak
tanımlanabilir. Hesaplamalar; farklı teorik modellerin kullanılabilmesi amacıyla
geliştirilmiş olan bilgisayar destekli TALYS 1.8 ve EMPIRE 3.2 kodlarında denge
ve denge-öncesi modeller seçilerek gerçekleştirilmiştir. Deneysel veriler ile
en uyumlu sonuçları üreten model, göreli varyans analizi ile tespit edilmiştir
ve farklı seviye yoğunluğu modellerinin hesaplamalara etkileri araştırılmıştır.
Elde edilen teorik hesaplama sonuçları, Uluslararası
Deneysel Nükleer Veri Kütüphanesi (EXFOR)
veri tabanından alınan deneysel veriler ve TENDL 2017 veri tabanından alınan
teorik değerler ile karşılaştırılmıştır.

Keywords

Tesir kesiti, Seviye yoğunluğu, TALYS 1.8, EMPIRE 3.2, Evropiyum

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