Decay of Europium-154

Juliano, Jose O.; Stephens, F. S.

doi:10.1103/physrev.108.341

Cited by 29 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Applying the offline correction factors to the peaks revealed the following energies with an uncertainty of ±7.5 keV: 1,277, 1,003, 877, 729, and 595 keV. The most probable emissions between 511 keV and 1.3 MeV for 154 Eu are 1,274.4, 1,004.7, 996.3, 873.2, 723.3, and 591.8 keV [ 13 , 14 , 15 ]. The agreement of the measured values to within 1% of the expected energies supports our theory that the increased count rates and observed spectra are the result of 154 Eu emissions.…”

Section: Resultsmentioning

confidence: 99%

The Level of Europium-154 Contaminating Samarium-153-EDTMP Activates the Radiation Alarm System at the US Homeland Security Checkpoints

et al. 2009

View full text Add to dashboard Cite

¹⁵³Sm-EDTMP is a radiopharmaceutical composed of EDTMP (ethylenediamine-tetramethylenephosphonate) and Samarium-153 [1]. ¹⁵³Sm-EDTMP has an affinity for skeletal tissue and concentrates in areas with increased bone turnover; thus, it is successfully used in relieving pain related to diffuse bone metastases [1]. The manufacturing process of ¹⁵³Sm-EDTMP leads to contamination with ¹⁵⁴Eu (Europium-154) [2]. A previous study only alluded to the retention of ¹⁵⁴Eu in the bones after receiving treatment with ¹⁵³Sm-EDTMP [2]. Activation of the alarm at security checkpoints after ¹⁵³Sm-EDTMP therapy has not been previously reported. Two out of 15 patients who received ¹⁵³Sm-EDTMP at Roger Maris Cancer Center (Fargo, N. Dak., USA) activated the radiation activity sensors while passing through checkpoints; one at a US airport and the other while crossing theAmerican-Canadian border. We assume that the ¹⁵⁴Eu which remained in the patients’ bones activated the sensors. Methods: In order to investigate this hypothesis, we obtained the consent from 3 of our 15 patients who received ¹⁵³Sm-EDTMP within the previous 4 months to 2 years, including the patient who had activated the radiation alarm at the airport. The patients were scanned with a handheld detector and a gamma camera for energies from 511 keV to 1.3 MeV. Results: All three patients exhibited identical spectral images, and further analysis showed that the observed spectra are the result of ¹⁵⁴Eu emissions. Conclusion: Depending on the detection thresholds and windows used by local and federal authorities, the remaining activity of ¹⁵⁴Eu retained in patients who received ¹⁵³Sm-EDTMP could be sufficient enough to increase the count rates above background levels and activate the sensors. At Roger Maris Cancer Center, patients are now informed of the potential consequences of ¹⁵³Sm-EDTMP therapy prior to initiating treatment. In addition, patients treated with ¹⁵³Sm-EDTMP at Roger Maris Cancer Center receive laminated cards stating the date and the dose of treatment, as well as a statement that the holder may activate the alarm at the security checkpoints.

show abstract

Section: Resultsmentioning

confidence: 99%

The Level of Europium-154 Contaminating Samarium-153-EDTMP Activates the Radiation Alarm System at the US Homeland Security Checkpoints

et al. 2009

View full text Add to dashboard Cite

show abstract

“…The results of such calculations made for the nuclei investigated here and other even-even nuclei of the rare earth region are presented in Table VIII. [31][32][33][34][35][36][37][38][39][40][41][42][43] There is not much correlation between the experimental data and the calculated values. This is not too surprising for the details of the rotation-vibration correction term depend upon the assumptions of the incompressible model and as such are expected to give only an orientation in the magnitudes involved.…”

Section: General Conclusionmentioning

confidence: 99%

Electron Capture Decay ofTm168andTm166

Jacob

Mihelich²,

Harmatz³

et al. 1960

Phys. Rev.

View full text Add to dashboard Cite

“…The spin and parity assignment of the 998-and 1129-keV levels are 2+ and 3+, respectively, on the basis of directional correlation 14,15 and conversion coefficient measurements. 10,13 These levels are probably members of a gamma vibrational band with K-2. The E2 transitions de-exciting these levels to the ground-rotational band are expected to be enhanced by about a factor of ten in comparison with the single proton value.…”

Section: Introductionmentioning

confidence: 99%