Delayed neutron emission induced by 800 mev protons
Download
1 / 18

Delayed Neutron Emission Induced by 800 MeV Protons - PowerPoint PPT Presentation


  • 190 Views
  • Uploaded on

Delayed Neutron Emission Induced by 800 MeV Protons. Steven Greene, LANL 11/14/2007. Slide 1. LANL Research Team. Chris Morris, P-25 ( Principal Investigator ) Steve Greene, P-25 Mark Makela, P-25 David Clark, P-22 Randy Spaulding, ISU Fesseha Mariam, P-25 Lori Waters, D-5

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Delayed Neutron Emission Induced by 800 MeV Protons' - gail


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Delayed neutron emission induced by 800 mev protons l.jpg

Delayed Neutron Emission Induced by 800 MeV Protons

Steven Greene, LANL

11/14/2007

Slide 1


Lanl research team l.jpg
LANL Research Team

Chris Morris, P-25 (Principal Investigator)

Steve Greene, P-25

Mark Makela, P-25

David Clark, P-22

Randy Spaulding, ISU

Fesseha Mariam, P-25

Lori Waters, D-5

Jay Elson, D-5

Greg Canavan, P-DO

Slide 2




Experimental setup ol station l.jpg
Experimental Setup - OL Station

Target ladder for small “bare” targets

Vacuum Beam Pipe

He3 detector and

LaBr detector

34-in target distance






Delayed neutrons from 18 o al cu over long times l.jpg
Delayed Neutrons from 18O, Al, Cu Over Long Times


Delayed neutrons from 18 o al cu at short times l.jpg
Delayed Neutrons from 18O, Al, Cu at Short Times





Slide15 l.jpg

Delayed Cross Sections vs. Z

  • Delayed neutrons from Pb, Hg, Au appear to arise from fission.

  • 18O has the highest delayed neutron production of all targets measured.

  • Typical background materials like iron and Aluminum have cross sections ~1/100th of Uranium


Experimental setup il2 station l.jpg
Experimental Setup - IL2 station

Ladder

DU: 1”x4”x4”

Shielding

Water, Al, Steel, Pb

Various thicknesses

Null

Proton Beam centerline

22.50

Pb: 2”x4”x8”

Quad He3 detector

315-cm target distance

310

He3 detector and

LaBr detector

173-cm target distance

440


Shielding l.jpg
Shielding

  • Material density thickness*

  • No shielding (air) 0.1 g/cm2

  • Aluminum 27.4 g/cm2 4”

  • Steel 81 g/cm2 4”

  • Water 30.4 g/cm2 12”

  • Polyethylene (CH2) 29.5 g/cm2 12.5”

  • Sand (SiO2) 44.7 g/cm2 8”

  • Lead 229.6 g/cm2 8”

*minimum linear thickness of materials

--protons & neutrons traveled through materials at an angle of 22.50



ad