FH40

Question 1

What does the FH40GL measure solo?

Answer 1

Just gamma

Question 2

Ceiling value for FH40?

Answer 2

10 REM/hr

Question 3

What does the NBR-Detector FHZ 672 E do?

Answer 3

It detects and differentiates between natural and artificial radiation.

Question 4

What happens when the red LED is on during startup?

Answer 4

The detector is in background learning mode for about 1 minute.

Question 5

What indicates the detector is ready for use?

Answer 5

The green LED flashes.

Question 6

What does a flashing green LED mean in normal operation?

Answer 6

Normal mode, no artificial radiation detected.

Question 7

What does a flashing red LED indicate?

Answer 7

Detection of artificial radiation.

Question 8

What does it mean if both LEDs are flashing?

Answer 8

Anomalous radiation detected, possibly from K-40 (Potassium-40).

Question 9

What does the FH 40 G-Display show?

Answer 9

Dose rate and artificial radiation detection.

Question 10

What is the check source used for HV calibration?

Answer 10

Cs-137 (Cesium-137).

Question 11

How do you start HV calibration?

Answer 11

Select function CAL672 and hold the ▼ button for 3 seconds, twice.

Question 12

What LED behavior occurs during calibration?

Answer 12

Red and green LEDs flash alternately.

Question 13

When is calibration complete?

Answer 13

When all LEDs turn off, and the green LED flashes five times.

Question 14

What must you wait for after calibration before using the detector?

Answer 14

The background learning mode to finish (1 minute), indicated by green LED flashing.

Question 15

With blue probe what will it detect?

Answer 15

Alpha, beta, gamma

Question 16

Ceiling value with blue probe?

Answer 16

100mRem/hr

Question 17

Type of detector in blue probe?

Answer 17

NBR
Natural background rejector

Question 18

What is Organic Scintillation Detection?

Answer 18

A radiation detection method using an organic scintillator that emits light when exposed to ionizing radiation, which is then converted into an electrical signal.

Question 19

What does NBR stand for in radiation detection?

Answer 19

Natural Background Rejection

Question 20

What is the purpose of Natural Background Rejection (NBR)?

Answer 20

A signal processing technique that filters out naturally occurring radiation to enhance detection of artificial gamma radiation sources.

Question 21

Fill in the blank: Organic Scintillation Detection uses an organic _______ that emits light when exposed to ionizing radiation.

Answer 21

[scintillator]

Question 22

True or False: Natural Background Rejection is used to detect naturally occurring radiation.

Answer 22

False

Question 23

What does an organic scintillator do when exposed to radiation?

Answer 23

It emits light (photons)

Organic scintillators are materials that emit light in response to ionizing radiation.

Question 24

What component converts the light from the scintillator into an electrical signal?

Answer 24

A photomultiplier tube (PMT) or a solid-state sensor

These devices are essential for converting optical signals into measurable electrical signals.

Question 25

What type of radiation does organic scintillation detection primarily detect?

Answer 25

Gamma radiation and sometimes beta radiation ## Footnote Organic scintillation detectors are particularly sensitive to high-energy photons.

Question 26

How does the detector measure radiation intensity?

Answer 26

By analyzing the number and energy of light pulses produced ## Footnote The intensity of radiation is directly related to the light output from the scintillator.

Question 27

Why is organic scintillation useful for radiation detection?

Answer 27

It provides fast response times and good sensitivity to gamma radiation ## Footnote This makes it suitable for various applications in radiation monitoring.

Question 28

What is the purpose of NBR technology?

Answer 28

To filter out natural background radiation and focus on artificial sources ## Footnote This technology is crucial for improving the accuracy of radiation detection.

Question 29

What is a common naturally occurring radioactive isotope that NBR filters out?

Answer 29

Potassium-40 (K-40) ## Footnote K-40 is a prevalent isotope found in the environment that contributes to natural background radiation.

Question 30

How does NBR differentiate between natural and artificial radiation?

Answer 30

By analyzing the energy spectrum of detected radiation ## Footnote The energy spectrum provides insights into the source of the radiation.

Question 31

Why is NBR useful in radiation monitoring?

Answer 31

It helps reduce false alarms and improves detection of dangerous artificial radiation ## Footnote This is particularly important in security and safety applications.

Question 32

What types of artificial radiation can NBR help identify?

Answer 32

* Cesium-137 (Cs-137) * Cobalt-60 (Co-60) * Other man-made radioactive sources ## Footnote Identifying these sources is critical for radiation safety and emergency response.