Beam-shaping body for neutron capture treatment

Beam-shaping body for neutron capture treatment

  • CN 106,512,233 B
  • Filed: 09/11/2015
  • Issued: 12/04/2018
  • Est. Priority Date: 09/11/2015
  • Status: Active Grant
First Claim
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1. it is a kind of for neutron capture treatment beam-shaping body, it is characterised in that:

  • the beam-shaping body include beam entrance,Target, the slow body for being adjacent to the target are enclosed in the slow external reflector, hanker with what the slow body abuttedSub- absorber, setting are exported in the intracorporal radiation shield of the beam-shaping and beam, the target with from the beam entranceNuclear reaction occurs for incident proton beam to generate neutron, and the neutron forms neutron beam, and the neutron beam limits a masterAxis, the slow body is by from the neutron degradation that the target generates to epithermal neutron energy area, and the material of the slow body is by containingPbF4

    Al2O3

    AlF3

    CaF2Or MgF2One of or multiple mixed materials and occupy and described contain PbF4

    Al2O3

    AlF3

    CaF2Or MgF2One of or the weight percent of multiple mixed materials be that 0.1-5% containing6The material of Li element mixes systemAt wherein the material of the slow body by hot-pressing sintering technique or is put through hot-press sintering equipment or discharging plasma sintering equipmentElectric plasma sintering process becomes block by powder or powder compact, and the hot-press sintering equipment includes heating furnace, is placed in described addIt pressurizing device, mold in hot stove, the powder being packed into the mold or powder compact and is set for controlling the hot pressed sinteringThe standby control device worked normally, the hot-pressing sintering technique include the following steps;

    to be filled with suitable powder or powder compactThe mold;

    The hot pressing furnace is opened with preset pressure and temperature parameter;

    The mobile pressurizing device is to the powder in the moldEnd or powder compact pressurization;

    The control device controls the hot-press sintering equipment in the case of normal work;

    It is powered to burnForm block, the neutron that the reflector will deviate from the main shaft leads back to the main shaft to improve epithermal neutron intensity of beam, describedMulti-dose, the radiation shield were caused with shallow-layer normal tissue when thermal neutron absorber is for absorbing thermal neutron to avoid treatmentFor shielding neutron and the photon of leakage to reduce the normal tissue dose in non-irradiated area.

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