ORTEC Detective X, Руководство пользователя

Страница: 52 / 131

ORTEC
®
Detective
®
X Handheld Radioisotope Identifier 1107231N / 082020
40
Figure 51. IDs Box
Each row in the IDs Box contains the following:
Classification, ID String, Sub-Classification, Q Value 2
Classification values are defined as:

Innocent (reported as I ), with a green background

Suspect (reported as S ), with a yellow background

Threat (reported as T ), with a red background
ID String:
 Nuclide name from the Identification Table (see APPENDIX C)
Sub-Classification values are defined as:

Bremsstrahlung (reported as
Brem.
)

Industrial (reported as
Ind.
)

Medical (reported as
Med.
)

Neptunium (reported as
Np.
)

NORM (reported as
NORM
)

Other (reported as
Oth.
)

Plutonium (reported as
Pu
)

Thorium (reported as
Th
)

Uranium (reported as
U
)
The Q value (confidence factor) will be displayed to 1 decimal place on the right side of the ID listing. For
nuclides with only one primary peak, this confidence level is the net counts in the peak divided by the peak
uncertainty. As the net counts in the peak increase, the uncertainty decreases, and the confidence level
correspondingly increases.
2 Ronald M. Keyser, Frank Sergent, Timothy R. Twomey, Daniel L. Upp, Minimum Detectable Activity Estimates for a Germanium-
Detector Based Spectroscopic Portal Monitor , INMM, July 2006.
IMPORTANT The confidence value stored in the N42.42 file is the displayed Q value divided by 100
so the file will meet the schema requirements. Although uncommon, Q values greater
than 100 all result in a maximum valid stored N42.42 file confidence value of 1.