In this 'WOrk , the angular distributions for eTastic ·and. iBela:~ii.tc scattering of fast neutrons in fusion .reactor materials l'ia:~te<~ studied Lithium and wad material are- -likely' ';;i;"be ~n CCIUfX)nents of fusion reactor wall con£igut'atiQn qesign .. .We m=asurements were perfonnedusing an associated part;icl~,~~-; flight technique • The 14 and 14 .. 44 Mev neutrons were p~u¢ed 1;Jy. ;tli.$ T(d,n} 4He reaction with deut.erons Peinga<;eelerated in a 150kev SAME..S type Jaccelerator at ASTON and in.the 3. Mev ~~ at the Jo.i;nt Radiation. Centre I Birmingham I. res~vely; .. The q,ss.Qcj.a.~~ alpha-particles and fast. neu.tJ;qri$ Were; deteeteCl!. ~;¥.'~l :o£'·~·:p~a;§~¢; scintillator rrpunted on. a fa:st£GC1.Jsed photoroillmplj;er<t~,.;·1n~j samples used were e~ended flatpl.a:tesj of tb.icJ<n~ss~s upt.o'0~9-~... . free-path for Uthium and 1.562 Irean-fre~path fC)r ~~ • . The differential elastic seatteringcrQSs-.seefiQns· 'Wer~'tteas~ea,'for 14 Mev neutron.s for vgriousthicJmesses Qf Lithiunl ~. ~d inthel angular range from zero to; 90/ •• ]naooit.iorf , tile; angul;at':',: distributions of elastically scattered 14,.44 Mev .neutrons;·· £liein . Lithium. samples were studied in thes~' angular range: •. Inelastic scattering to the 4.63 Mev state in ~Lian<l the state I and 4 •. 1 Mev state I' in 2013Bb hay;e:been :meas~ed.T1ie,resria:Jts: . are ca:npared to ENDF!l3-IV data files and to previous fuea$ur~ts .,:' For the Lead samples the differential neutron sca,~terin9:¢:'Q$.$""'·: sections for discrete 3 Mev ranges and tile' angplardistributiQhS~lie' measured The increase in effective cross-section due tQlIJ\llt;;£plll~; . scattering effects I as the sample thic:1mess:, increas.ed:waS 'foun(~Ft.Q; . be predicted by tile empirical .relation cY =Q;:exp.(K-x}. A g96d,:E~;j;.t:Q, the eJ{perirrental data was obtained using the universa.1C0~t.;inl:.,"~i~'~ The differential elastics¢q;ttering "'crQss,,,:,,,section da:£a for,~,. . samples Qf Lithium and Lead were, a,nal:yzed in terms of' optical' nPii~it, .' calculations using the. conputer code. RARCMPPararnetersear~, procedures produced good fits' to the· cross-sections • . . For the case of thick samples of Lithium and Lead , th¢rrea:s.~ed:· angular distributions of :the scattered neutrons we.re'~p3Iesi tQ,tl1,$ .. predictions of the continuous slowing down model.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:356364 |
| Date | January 1985 |
| Creators | Jasim, Mahdi H. |
| Publisher | Aston University |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://publications.aston.ac.uk/10594/ |
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