Opportunities at Kentucky
Opportunities at Kentucky
Jeff Vanhoy
US Naval Academy, Annapolis, Maryland
Supported by U.S. DoE FY20/21/22/23 awards
SC0021424, SC0021243, SC0021175, SSC000056
University of Kentucky, Chemistry
Erin Peters,
½
lecturer
Jackson Dowie, postdoc
Steven Yates, lab director
University of Dallas
Sally Hicks, emeritus
University Kentucky, Physics
1
NSF 1913028 / 2209178
Today’s Members
Mississippi State University
Daniel Araya, grad student
Jayden Ratcliffe, grad student
Stephan Vajdic, grad student
Ben Crider, prof
US Naval Academy
Jeff Vanhoy, prof
FiberTek, Inc & Army Res Lab - Adelphi
Jarrod Marsh
University of Kentucky, Chemistry
Yongchi Xiao, postdoc
University of Dallas
Elizabeth Chouinard, undergrad
Sarah Evans, undergrad
Recent Players
US Naval Academy
Avi Perkoff, undergrad
Madison Roskos, undergrad
LLNL
Anthony Ramirez
ugrad & grad students
, lab director, PI
learning neutrons
for govt research
Mississippi State University
‘Tutu’ Assumin-Gyimah, grad student
People about to be Invited
Staffing
(n,n’)
(n,n’
)
(n,n’
) & (n,n’
)
Side Projects
DANCE capture
4
2
silo
digital DAQ
exptl bay 1
Accelerator
HVEC Model CN: 7 MV
rf source
p, d,
3
He,
, … ions
Authorized for
3
H gas targets
measure exit neutron energy
1 ns pulse widths every 533 ns
•
Basic Nuclear Science
–
Nuclear Structure via (n,n'
)
•
Level Schemes & Transitions
•
Spectroscopic Information
•
DSAM Lifetimes
–
(
3
He,n
)
•
Applied Nuclear Science
–
Differential (n,n') Cross Sections
•
12,13
C,
7
Li,
19
F ,
54,56
Fe ,
23
Na ,
28
Si
–
Detector Development
•
Univ Guelph / TRIUMF
–
measurements for ‘friends’
historically
~50d BOT/y
3
Staffing
(n,n’)
(n,n’
)
(n,n’
) & (n,n’
)
Side Projects
DANCE capture
goniometer rotates 0 to ~155 deg
MAIN
n detector
Neutron Time-of-Flight
23
Na(n,n
k
)
4
Pulsed beam. PSD.
Exit channel neutrons sort by flight time.
(n,n’)
13C
7Li
27Al & 51V
others?
19F, 20xPb, 24Mg , 9Be
Anthony
Ramirez
LLNL
5
Thanks to OU & LANL
Originally the Lane 1981 samples
Allan Carlson
Thomas Massey
Matt Devlin
13
C
. Alan Carlson
“Recent Standards Work”, CSEWG 2023 @ BNL Nov 2022
a difference of opinions
Daniel Araya
MS State
IRMM/GELINA measurements favor high road
UKAL natLi(n,n’) measurements 2018, 2019
nELBE 2017 (2023) measurements favor low road
Price of enriched Li goes up 3x
OhioU loaned us enriched targets 2022
- - - targets didn’t have matching empty container.
Re-canned in March 2023
Re-measured in July 2023 with dDAQ, analysis w ROOT.
-- one of the largest samples we’ve ever done: atten & MS
-- challenges with (sample-container) subtr at forward angles.
7
Li
Arnd
Junghans
WINS2023
BGO
HPGe
(n,n’
)
197 keV
Ge 140 keV
110 keV
clean
contaminated
Time
Energy (keV*)
19
F
WINS2018 mtg
-- problems w both UKAL & GELINA
measurements
GELINA status
UKAL
22-29 Oct 2023
9
19
F
UKAL
22-29 Oct 2023
ExcFn 1.2-2.3 MeV
CaF
2
,
56
Fe,
nat
Ti,
nat
C, blank
5 pt AngDist to detect a4s
sample change every 20 min
Determined
-ray a
4
s
19
F,
nat
Ti &
56
Fe
ENSDF 89.3(10) ns
displayed values
un-corrected for
n
atten
& MS
If plot
yield vs cos
2
then a
4
jumps out at you
2
weeks
ago
10
51
V
Something’s wrong here.
Anthony Ramirez LLNL
From attempts to use 51V(n,n’
) as an xs
normalization, something ain’t right.
51V Level differences
ENSDF Eval, Jimin & Xiaolong, Mar 2016
11
Return of (n,n’
) coincidence
1999-2004
130Xe(n,n’
)
51V(n,n’
)
-tagged neutron spectra?
natCd,natXe Chris McGrath nat,126Te
12
Return of (n,n’
) coincidence
1999-2004
13
Can the technique of
Dynamic Biasing
help in the
modern world?
the idea:
Each channel in a nTOF spectrum is intended to
represent a specific energy of scattered neutrons.
n’
Scintillator fluid
Using signals from forward recoiling protons
reduces bckgnd &
sharpens TOF peaks
, especially
for low energy n.
1960 Boring
-ray atten in samples
1971-x dynamic biasing becomes popular
1970-1 Englebrecht methods for
neutron atten and MS corrections.
1975 Velkey describes Monte Carlo methods
for correcting ang dist
1980-y McEllistrem writes MULCAT
1980 MULCAT-BRC Lilley & MTM
1984 GAMBIT has been written by now.
Brandenberger & Grandy, NIM 93, 495 (1971)
LLD & ULD = fn (E deposited in scintillator)
SIDE PROJECTS
Transforming tof histograms
energy domain
i.e. Emission Spectra
What generates the peak-
Shirley effect in neutron
detectors, and why is it
masked in nTOF spectra?
Johansson and Campbell, “PIXE: A Novel
Technique for Elemental Analysis”,
JWiley&Sons
Templates: Arjan Koning
(?)
: Only 5 entries into EXFOR DDX in last 5 years
(efficiency corrected and normalized)
15
Staffing
(n,n’)
(n,n’
)
(n,n’
) & (n,n’
)
Side Projects
DANCE capture
Kentucky at DANCE
110,11,112,114
Cd(n,
)
several in 130, 132,134,136
Xe(n,
)
50,53
Cr(n,
)
4
BaF
2
array
measurements completed,
students analyzing
limboed by accel & LiH problems
Not yet proposed
Undergraduate students on the Carbon paper
from Sally Hicks
nat
data taken 2011-2016 & 2016-2020
64 (n,n’) ang distrib at 45 incident energies btw 0.5 - 8 MeV
+ 12 (n,n’
) btw 5.6-7.8 MeV
Ramirez, Phys Rev C 1023, 122446 (2022)
16
a monster project
nat
C
Dirty Hands
Laboratory Skills
Operation, Maintenance, Repair, Design
17
brought to you by
Conclusion
18
Damn the torpedoes, full speed ahead!
Retrieved from:
https://en.wikipedia.org/wiki/David_Farragut#/media/File:Admiral_Farragut2.jpg
US Public Domain
Story at: US Naval Institute:
https://www.usni.org/magazines/naval-history-magazine/2014/july/damn-torpedoes
RADM David Farragut (1801-1870)
“This powerful phrase isn’t about
underwater weapons or blasphemy but
rather a defiant call to take risks and
push forward, no matter the odds.”
Candace Osmond
“Damn the Torpedoes – Idiom, Origin & Meaning”
https://grammarist.com/idiom/damn-the-
torpedoes/#:~:text=Origin%20and%20Etymology%20Behind%20Damn%20t
he%20Torpedoes&text=The%20phrase%20is%20attributed%20to,to%20a%
20very%20surprising%20victory.
19
Dive into the world of research collaborations in science and academia, showcasing the vibrant network of individuals and institutions involved in cutting-edge projects. Explore the diverse range of players, recent participants, staffing dynamics, and intriguing side projects that add depth and innovation to the field.
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Presentation Transcript
Opportunities at Kentucky Jeff Vanhoy US Naval Academy, Annapolis, Maryland Supported by U.S. DoE FY20/21/22/23 awards SC0021424, SC0021243, SC0021175, SSC000056 Today s Members University of Kentucky, Chemistry Erin Peters, lecturer Jackson Dowie, postdoc Steven Yates, lab director Mississippi State University Daniel Araya, grad student Jayden Ratcliffe, grad student Stephan Vajdic, grad student Ben Crider, prof , lab director, PI ugrad & grad students University of Dallas Sally Hicks, emeritus US Naval Academy Jeff Vanhoy, prof University Kentucky, Physics FiberTek, Inc & Army Res Lab - Adelphi Jarrod Marsh 4 NSF 1913028 / 2209178 Recent Players University of Kentucky, Chemistry Yongchi Xiao, postdoc US Naval Academy Avi Perkoff, undergrad Madison Roskos, undergrad Staffing (n,n ) (n,n ) University of Dallas Elizabeth Chouinard, undergrad Sarah Evans, undergrad LLNL Anthony Ramirez (n,n ) & (n,n ) Side Projects DANCE capture Mississippi State University Tutu Assumin-Gyimah, grad student 1 People about to be Invited
exptl bay 1 silo digital DAQ Accelerator HVEC Model CN: 7 MV rf source p, d, 3He, , ions Authorized for 3H gas targets measure exit neutron energy 1 ns pulse widths every 533 ns Basic Nuclear Science Nuclear Structure via (n,n' ) Level Schemes & Transitions Spectroscopic Information DSAM Lifetimes (3He,n ) Applied Nuclear Science Differential (n,n') Cross Sections Detector Development Univ Guelph / TRIUMF measurements for friends 12,13C, 7Li, 19F , 54,56Fe , 23Na , 28Si 2
Staffing (n,n ) (n,n ) (n,n ) & (n,n ) Side Projects DANCE capture 3
Neutron Time-of-Flight Pulsed beam. PSD. Exit channel neutrons sort by flight time. 23Na(n,nk) MAIN n detector 13C 7Li Anthony Ramirez LLNL 27Al & 51V others? (n,n ) 19F, 20xPb, 24Mg , 9Be 4
. Alan Carlson Recent Standards Work, CSEWG 2023 @ BNL Nov 2022 Thanks to OU & LANL Originally the Lane 1981 samples Allan Carlson Thomas Massey Matt Devlin 13C 5
7Li a difference of opinions IRMM/GELINA measurements favor high road UKAL natLi(n,n ) measurements 2018, 2019 nELBE 2017 (2023) measurements favor low road Price of enriched Li goes up 3x OhioU loaned us enriched targets 2022 - - - targets didn t have matching empty container. Re-canned in March 2023 Re-measured in July 2023 with dDAQ, analysis w ROOT. -- one of the largest samples we ve ever done: atten & MS -- challenges with (sample-container) subtr at forward angles. Arnd Junghans WINS2023 Daniel Araya MS State
(n,n ) BGO HPGe
19F WINS2018 mtg -- problems w both UKAL & GELINA measurements GELINA status UKAL 22-29 Oct 2023 Ge 140 keV Energy (keV*) 197 keV 110 keV contaminated clean Time
2 UKAL 19F weeks ago 22-29 Oct 2023 ExcFn 1.2-2.3 MeV CaF2, 56Fe, natTi, natC, blank 5 pt AngDist to detect a4s sample change every 20 min Determined -ray a4s 19F, natTi & 56Fe displayed values un-corrected for n atten & MS If plot yield vs cos2 then a4 jumps out at you ENSDF 89.3(10) ns 9
From attempts to use 51V(n,n ) as an xs normalization, something ain t right. 51V Something s wrong here. 10 Anthony Ramirez LLNL ENSDF Eval, Jimin & Xiaolong, Mar 2016
Return of (n,n) coincidence 1999-2004 natCd,natXe Chris McGrath nat,126Te 130Xe(n,n ) 51V(n,n ) -tagged neutron spectra? 11
Return of (n,n) coincidence 1999-2004 12
SIDE PROJECTS Can the technique of Dynamic Biasing help in the modern world? LLD & ULD = fn (E deposited in scintillator) the idea: Each channel in a nTOF spectrum is intended to represent a specific energy of scattered neutrons. 1960 Boring -ray atten in samples 1971-x dynamic biasing becomes popular Scintillator fluid 1970-1 Englebrecht methods for neutron atten and MS corrections. n 1975 Velkey describes Monte Carlo methods for correcting ang dist 1980-y McEllistrem writes MULCAT 1980 MULCAT-BRC Lilley & MTM 1984 GAMBIT has been written by now. Using signals from forward recoiling protons reduces bckgnd & sharpens TOF peaks, especially for low energy n. 13 Brandenberger & Grandy, NIM 93, 495 (1971)
Transforming tof histograms i.e. Emission Spectra energy domain (efficiency corrected and normalized) Templates: Arjan Koning (?): Only 5 entries into EXFOR DDX in last 5 years What generates the peak- Shirley effect in neutron detectors, and why is it masked in nTOF spectra? Johansson and Campbell, PIXE: A Novel Technique for Elemental Analysis , JWiley&Sons
Kentucky at DANCE Staffing (n,n ) (n,n ) (n,n ) & (n,n ) Side Projects DANCE capture 4 BaF2 array measurements completed, students analyzing 110,11,112,114Cd(n, ) several in 130, 132,134,136Xe(n, ) 50,53Cr(n, ) limboed by accel & LiH problems Not yet proposed 15
from Sally Hicks natC Undergraduate students on the Carbon paper data taken 2011-2016 & 2016-2020 a monster project 64 (n,n ) ang distrib at 45 incident energies btw 0.5 - 8 MeV + 12 (n,n ) btw 5.6-7.8 MeV 16 Ramirez, Phys Rev C 1023, 122446 (2022)
Dirty Hands Laboratory Skills brought to you by Operation, Maintenance, Repair, Design 17
Conclusion Damn the torpedoes, full speed ahead! This powerful phrase isn t about underwater weapons or blasphemy but rather a defiant call to take risks and push forward, no matter the odds. Candace Osmond Damn the Torpedoes Idiom, Origin & Meaning https://grammarist.com/idiom/damn-the- torpedoes/#:~:text=Origin%20and%20Etymology%20Behind%20Damn%20t he%20Torpedoes&text=The%20phrase%20is%20attributed%20to,to%20a% 20very%20surprising%20victory. RADM David Farragut (1801-1870) US Public Domain Retrieved from: https://en.wikipedia.org/wiki/David_Farragut#/media/File:Admiral_Farragut2.jpg Story at: US Naval Institute: https://www.usni.org/magazines/naval-history-magazine/2014/july/damn-torpedoes 18
