TF Antimony - Revision history

Foretony: /* References */

2023-12-29T22:53:21Z

References

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References

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References

Foretony: /* Tellurium(Te) to Antimony(Sb) */

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Tellurium(Te) to Antimony(Sb)

Foretony: /* Research Plan */

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Research Plan

Foretony: /* Tellurium(Te) to Antimony(Sb) */

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Tellurium(Te) to Antimony(Sb)

Foretony: /* Tellurium(Te) to Antimony(Sb) */

2023-11-22T10:01:46Z

Tellurium(Te) to Antimony(Sb)

Foretony: /* Tellurium(Te) to Antimony(Sb) */

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Tellurium(Te) to Antimony(Sb)

Foretony: /* Tellurium(Te) to Antimony(Sb) */

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Tellurium(Te) to Antimony(Sb)

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References

@@ Line 121: / Line 121: @@
 Sb-119 meta stable state intensities from internal conversion of Te-119 and Te-119m
-https://inspirehep.net/literature/52131
+https://journals.aps.org/pr/abstract/10.1103/PhysRev.158.1183
 [[TF_Isotopes]]

← Older revision		Revision as of 22:52, 29 December 2023
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	Cross-section measurements for (n, 2n) and (n, p) reactions on tellurium isotopes in the neutron energy range of 13.5−14.6 MeV		Cross-section measurements for (n, 2n) and (n, p) reactions on tellurium isotopes in the neutron energy range of 13.5−14.6 MeV

		+	Sb-119 meta stable state intensities from internal conversion of Te-119 and Te-119m
		+
		+	https://inspirehep.net/literature/52131
	[[TF_Isotopes]]		[[TF_Isotopes]]

@@ Line 99: / Line 99: @@
 =References=
+[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8521447/  Meitner-Auger Electron Emitters for Targeted Radionuclide Therapy: Mercury-197m/g and Antimony-119]
 [https://pubs.acs.org/doi/10.1021/acscentsci.8b00869 Large Scale Production of 119mTe and 119Sb for Radiopharmaceutical Applications] ,Kevin T. Bennett, Sharon E. Bone, Andrew C. Akin, Eva R. Birnbaum, Anastasia V. Blake, Mark Brugh, Scott R. Daly, Jonathan W. Engle, Michael E. Fassbender, Maryline G. Ferrier, Stosh A. Kozimor*, Laura M. Lilley, Christopher A. Martinez, Veronika Mocko, Francois M. Nortier, Benjamin W. Stein, Sara L. Thiemann, and Christiaan Vermeulen,

@@ Line 24: / Line 24: @@
 =Tellurium(Te) to Antimony(Sb)=
-A pure Tellurium foils is immersed in a bremsstrahlung beam to eject a proton from Te-120 leaving the Antimony isotope Se-119.  Se-119 has a 38 hour half life.
+A pure Tellurium foils is immersed in a bremsstrahlung beam to eject a proton from Te-120 leaving the Antimony isotope Sb-119.  Sb-119 has a 38 hour half life.
-Se-119 emits auger electrons ( electrons emitted when a high level electron moves down to fill a vacancy).  X-rays may also be produced when an electron moves down to fill a vacancy,  the dominant X-rays emitted have energies of about 25 keV.  Sb-119 decays to Sn-119 when a proton converts to a neutron plus a positron. The resulting Sn-119 is always in an excited state and decays in 18 ns to its ground state giving off a photon of energy 24 keV.
+Sb-119 emits auger electrons ( electrons emitted when a high level electron moves down to fill a vacancy).  X-rays may also be produced when an electron moves down to fill a vacancy,  the dominant X-rays emitted have energies of about 25 keV.  Sb-119 decays to Sn-119 when a proton converts to a neutron plus a positron. The resulting Sn-119 is always in an excited state and decays in 18 ns to its ground state giving off a photon of energy 24 keV.
 \gamma + Te-120 -> Sb-119 + p

@@ Line 12: / Line 12: @@
 Questions:
-.) How low of an Se concentration are they able to detect in the columns?
+.) How low of an Sb concentration are they able to detect in the columns?
   Answer: nanograms
-===Year 1:==  Procure 6, 1 mg powder samples of Te-120 ($24k). Irradiate one sample and measure the gamma spectrum for 511's as well as try to identify contaminants.  Irradiate the previous sample and a new sample sending the new sample to LANL for separation and measure the gamma spectra of the other.  Goal will be to measure a correlation between the observed gamma spectrum (511's from the Te-119->Se-119 decay) and the amount of Se-119 that is separated.  Irradiate another sample to improve Se production based on the separation results of the first sample (may need to adjust irradiation times, target mass, target geometry,...).  Try to revert the aqueous solution of Te that was separated back to powder form for a repeated irradiation.
+===Year 1:==  Procure 6, 1 mg powder samples of Te-120 ($24k). Irradiate one sample and measure the gamma spectrum for 511's as well as try to identify contaminants.  Irradiate the previous sample and a new sample sending the new sample to LANL for separation and measure the gamma spectra of the other.  Goal will be to measure a correlation between the observed gamma spectrum (511's from the Te-119->Sb-119 decay) and the amount of Sb-119 that is separated.  Irradiate another sample to improve Sb production based on the separation results of the first sample (may need to adjust irradiation times, target mass, target geometry,...).  Try to revert the aqueous solution of Te that was separated back to powder form for a repeated irradiation.
-==Year 2==Based on the results from year 1, acquire natural Tellurium samples of masses from 1 g to 25 grams to confirm scalability of the irradiation method.  The separation system needed 36 hours to separate Te-119m from a 25 g mass of natural Sb that was irradiated with protons.  A large portion of the time was needed to dissolve the 25 g mass of Se. While the mg masses sent to ILANL in year one can go through the separation process in a day, the larger masses will require more time for dissolving and possibly waiting for sample activity to decrease.  Instead consuming 24 hours shipping the sample to LANL, we will install a separation system at the IAC substantially shortening the delay from stopping the irradiation to processing.  The dominant delay becomes how long we need to wait for the activity of the large mass samples to diminish so they may be handled safely.  Do we need a hot cell at the IAC?
+==Year 2==Based on the results from year 1, acquire natural Tellurium samples of masses from 1 g to 25 grams to confirm scalability of the irradiation method.  The separation system needed 36 hours to separate Te-119m from a 25 g mass of natural Sb that was irradiated with protons.  A large portion of the time was needed to dissolve the 25 g mass of Sb. While the mg masses sent to ILANL in year one can go through the separation process in a day, the larger masses will require more time for dissolving and possibly waiting for sample activity to decrease.  Instead consuming 24 hours shipping the sample to LANL, we will install a separation system at the IAC substantially shortening the delay from stopping the irradiation to processing.  The dominant delay becomes how long we need to wait for the activity of the large mass samples to diminish so they may be handled safely.  Do we need a hot cell at the IAC?
-==Year 3==  Optimize the Se-119 production method using Natural Te and in house separation. Determine the performance of continuous production over a two month period.  Irradiate material once or twice a week to reload the separation system and build up an Isotope sample of Te-119m.  Measure the output of Se-119 over the period of a month.
+==Year 3==  Optimize the Sb-119 production method using Natural Te and in house separation. Determine the performance of continuous production over a two month period.  Irradiate material once or twice a week to reload the separation system and build up an Isotope sample of Te-119m.  Measure the output of Sb-119 over the period of a month.
 =Tellurium(Te) to Antimony(Sb)=

← Older revision		Revision as of 13:59, 7 December 2023
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	\gamma + Te-120 -> Sb-119 + p		\gamma + Te-120 -> Sb-119 + p
		+
		+	[[TF_Natural_Te_reactions]]

	Yield Problem: Te-120 is only 0.1% of the natural abundance. Highest natural abundance is Te-126 at 19%, then Te-125 at 7%, Te-124 at 5%, Te-122 at 2.5%, Te-123 at 1%.		Yield Problem: Te-120 is only 0.1% of the natural abundance. Highest natural abundance is Te-126 at 19%, then Te-125 at 7%, Te-124 at 5%, Te-122 at 2.5%, Te-123 at 1%.

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 Yield Problem:  Te-120 is only 0.1% of the natural abundance.  Highest natural abundance is Te-126 at 19%, then Te-125 at 7%, Te-124 at 5%,  Te-122 at 2.5%, Te-123 at 1%.
-  A powder that is 50% Te-120 by volume can be procured for about $2000/mg
+  A powder that is 50% Te-120 by volume can be procured for about $2000/mg [[File:3006448 Idaho State.pdf|thumb]] [[File:Te-120 Batch 165890.pdf|thumb]]
-<ref>another vendor for 97% purity  https://en.institut-seltene-erden.de/unser-service-2/metall-preise/preise-fuer-stabile-isotope/</ref>
+another vendor for 97% purity  https://en.institut-seltene-erden.de/unser-service-2/metall-preise/preise-fuer-stabile-isotope/

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 [https://www.sciencedirect.com/science/article/abs/pii/S0003267000878228 Anion exchange separation of tin, antimony and tellurium], GilbertW. SmithS.A.Reynolds , Analytica Chimica Acta
 Volume 12, 1955, Pages 151-153
 [[TF_Isotopes]]